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Emergency workers patrol the scene Saturday, April 20, 2013, three days after an explosion at a fertilizer plant in West, Texas. The massive explosion at the West Fertilizer Co. Wednesday night killed at least 14 people and injured more than 160. (AP PhotoCharlie Riedel)
Emergency workers patrol the scene Saturday, April 20, 2013, three days after an explosion at a fertilizer plant in West, Texas. The massive explosion at the West Fertilizer Co. Wednesday night killed at least 14 people and injured more than 160. (AP Photo/Charlie Riedel)
People attend a service at St. Marys Church of the Assumption, Friday, April 19, 2013, two days after an explosion at a fertilizer plant in West, Texas. The massive explosion at the West Fertilizer Co. Wednesday night killed 14 people including numerous members of the West Volunteer Fire Department and injured more than 160. (AP PhotoCharlie Riedel)
People attend a service at St. Mary's Church of the Assumption, Friday, April 19, 2013, two days after an explosion at a fertilizer plant in West, Texas. The massive explosion at the West Fertilizer Co. Wednesday night killed 14 people including numerous members of the West Volunteer Fire Department and injured more than 160. (AP Photo/Charlie Riedel)
Members of the West Volunteer Fire Department leave the church after attending a service at St. Marys Church of the Assumption, Friday, April 19, 2013, two days after an explosion at a fertilizer plant in West, Texas. The massive explosion at the West Fertilizer Co. Wednesday night killed 14 people including numerous members of the West Volunteer Fire Department and injured more than 160. (AP PhotoCharlie Riedel)
Members of the West Volunteer Fire Department leave the church after attending a service at St. Mary's Church of the Assumption, Friday, April 19, 2013, two days after an explosion at a fertilizer plant in West, Texas. The massive explosion at the West Fertilizer Co. Wednesday night killed 14 people including numerous members of the West Volunteer Fire Department and injured more than 160. (AP Photo/Charlie Riedel)
Members of the West Volunteer Fire Department listen to a service at St. Marys Church of the Assumption, Friday, April 19, 2013, two days after an explosion at a fertilizer plant in West, Texas. The massive explosion at the West Fertilizer Co. Wednesday night killed 14 people including numerous members of the West Volunteer Fire Department and injured more than 160. (AP PhotoCharlie Riedel)
Members of the West Volunteer Fire Department listen to a service at St. Mary's Church of the Assumption, Friday, April 19, 2013, two days after an explosion at a fertilizer plant in West, Texas. The massive explosion at the West Fertilizer Co. Wednesday night killed 14 people including numerous members of the West Volunteer Fire Department and injured more than 160. (AP Photo/Charlie Riedel)
Shown are the remains of a fertilizer plant destroyed by an explosion in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP PhotoLM Otero)
Shown are the remains of a fertilizer plant destroyed by an explosion in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP Photo/LM Otero)
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A destroyed car sits as firefighters conduct a search and rescue of an apartment complex destroyed by an explosion at a fertilizer plant in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP PhotoLM Otero)
A destroyed car sits as firefighters conduct a search and rescue of an apartment complex destroyed by an explosion at a fertilizer plant in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP Photo/LM Otero)
Firefighters use flashlights early Thursday morning, April 18, 2013 to search a destroyed apartment complex near a fertilizer plant that exploded Wednesday night in West, Texas. The massive explosion killed as many as 15 people and injured more than 160, shaking the ground with the strength of a small earthquake and leveling homes and businesses for blocks in every direction. (AP PhotoLM Otero)
Firefighters use flashlights early Thursday morning, April 18, 2013 to search a destroyed apartment complex near a fertilizer plant that exploded Wednesday night in West, Texas. The massive explosion killed as many as 15 people and injured more than 160, shaking the ground with the strength of a small earthquake and leveling homes and businesses for blocks in every direction. (AP Photo/LM Otero)
Bobby Rios, right, helps clean up the shattered display windows at Treasure on the Tracks in the central business district of West, Texas on Thursday April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. The explosion that struck around 8 p.m. Wednesday, sent flames shooting into the night sky and rained burning embers and debris down on shocked and frightened residents. (AP PhotoThe Fort Worth Star-Telegram, Ron T. Ennis) MAGS OUT (FORT WORTH WEEKLY, 360 WEST)
Bobby Rios, right, helps clean up the shattered display windows at Treasure on the Tracks in the central business district of West, Texas on Thursday April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. The explosion that struck around 8 p.m. Wednesday, sent flames shooting into the night sky and rained burning embers and debris down on shocked and frightened residents. (AP Photo/The Fort Worth Star-Telegram, Ron T. Ennis) MAGS OUT; (FORT WORTH WEEKLY, 360 WEST)
A Texas State Trooper stops a truck at a road block in the central business district of West, Texas on Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. The explosion that struck around 8 p.m. Wednesday, sent flames shooting into the night sky and rained burning embers and debris down on shocked and frightened residents. (AP PhotoThe Fort Worth Star-Telegram, Ron T. Ennis) MAGS OUT (FORT WORTH WEEKLY, 360 WEST)
A Texas State Trooper stops a truck at a road block in the central business district of West, Texas on Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. The explosion that struck around 8 p.m. Wednesday, sent flames shooting into the night sky and rained burning embers and debris down on shocked and frightened residents. (AP Photo/The Fort Worth Star-Telegram, Ron T. Ennis) MAGS OUT; (FORT WORTH WEEKLY, 360 WEST)
Maria Galvan looks for damage to merchandise inside the West Thrift Shop in West, Texas on Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. The explosion that struck around 8 p.m. Wednesday, sent flames shooting into the night sky and rained burning embers and debris down on shocked and frightened residents. (AP PhotoThe Fort Worth Star-Telegram, Paul Moseley) MAGS OUT (FORT WORTH WEEKLY, 360 WEST)
Maria Galvan looks for damage to merchandise inside the West Thrift Shop in West, Texas on Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. The explosion that struck around 8 p.m. Wednesday, sent flames shooting into the night sky and rained burning embers and debris down on shocked and frightened residents. (AP Photo/The Fort Worth Star-Telegram, Paul Moseley) MAGS OUT; (FORT WORTH WEEKLY, 360 WEST)
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Merchandise and smashed glass are scattered in the front windows of the West Thrift Shop in West, Texas on Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. The explosion that struck around 8 p.m. Wednesday, sent flames shooting into the night sky and rained burning embers and debris down on shocked and frightened residents. (AP PhotoThe Fort Worth Star-Telegram, Paul Moseley) MAGS OUT (FORT WORTH WEEKLY, 360 WEST)
Merchandise and smashed glass are scattered in the front windows of the West Thrift Shop in West, Texas on Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. The explosion that struck around 8 p.m. Wednesday, sent flames shooting into the night sky and rained burning embers and debris down on shocked and frightened residents. (AP Photo/The Fort Worth Star-Telegram, Paul Moseley) MAGS OUT; (FORT WORTH WEEKLY, 360 WEST)
The shattered display windows are cleared away at the Treasure on the Tracks in the central business district of West, Texas on Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. The explosion that struck around 8 p.m. Wednesday, sent flames shooting into the night sky and rained burning embers and debris down on shocked and frightened residents. (AP PhotoThe Fort Worth Star-Telegram, Ron T. Ennis) MAGS OUT (FORT WORTH WEEKLY, 360 WEST)
The shattered display windows are cleared away at the Treasure on the Tracks in the central business district of West, Texas on Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. The explosion that struck around 8 p.m. Wednesday, sent flames shooting into the night sky and rained burning embers and debris down on shocked and frightened residents. (AP Photo/The Fort Worth Star-Telegram, Ron T. Ennis) MAGS OUT; (FORT WORTH WEEKLY, 360 WEST)
Firefighters stand on a rail line and survey the remains of a fertilizer plant destroyed by an explosion in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP PhotoLM Otero)
Firefighters stand on a rail line and survey the remains of a fertilizer plant destroyed by an explosion in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP Photo/LM Otero)
Firefighters conduct search and rescue of an apartment destroyed by an explosion at a fertilizer plant in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP PhotoLM Otero)
Firefighters conduct search and rescue of an apartment destroyed by an explosion at a fertilizer plant in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP Photo/LM Otero)
A firefighter surveys the blast zone destroyed by an explosion at a fertilizer plant during search and rescue efforts in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP PhotoLM Otero)
A firefighter surveys the blast zone destroyed by an explosion at a fertilizer plant during search and rescue efforts in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP Photo/LM Otero)
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Emergency workers evacuate elderly from a damaged nursing home following an explosion at a fertilizer plant Wednesday, April 17, 2013, in West, Texas. An explosion at a fertilizer plant near Waco caused numerous injuries and sent flames shooting high into the night sky on Wednesday. (AP PhotoWaco Tribune Herald, Rod Aydelotte)
Emergency workers evacuate elderly from a damaged nursing home following an explosion at a fertilizer plant Wednesday, April 17, 2013, in West, Texas. An explosion at a fertilizer plant near Waco caused numerous injuries and sent flames shooting high into the night sky on Wednesday. (AP Photo/Waco Tribune Herald, Rod Aydelotte)
Firefighters conduct search and rescue the the blast zone destroyed by an explosion at a fertilizer plant in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP PhotoLM Otero)
Firefighters conduct search and rescue the the blast zone destroyed by an explosion at a fertilizer plant in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP Photo/LM Otero)
A firefighter handles a childrens bunk bed during a search and rescue of an apartment destroyed by an explosion at a fertilizer plant in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP PhotoLM Otero)
A firefighter handles a children's bunk bed during a search and rescue of an apartment destroyed by an explosion at a fertilizer plant in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP Photo/LM Otero)
A firefighter stands on a rail line and surveys the remains of a fertilizer plant destroyed by an explosion in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP PhotoLM Otero)
A firefighter stands on a rail line and surveys the remains of a fertilizer plant destroyed by an explosion in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP Photo/LM Otero)
Firefighter conduct search and rescue of an apartment destroyed by an explosion at a fertilizer plant in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP PhotoLM Otero)
Firefighter conduct search and rescue of an apartment destroyed by an explosion at a fertilizer plant in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP Photo/LM Otero)
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Firefighters conduct search and rescue of an apartment destroyed by an explosion at a fertilizer plant in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP PhotoLM Otero)
Firefighters conduct search and rescue of an apartment destroyed by an explosion at a fertilizer plant in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP Photo/LM Otero)
Firefighters conduct search and rescue of an apartment destroyed by an explosion at a fertilizer plant in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP PhotoLM Otero)
Firefighters conduct search and rescue of an apartment destroyed by an explosion at a fertilizer plant in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP Photo/LM Otero)
Firefighters conduct a search and rescue of an apartment destroyed by an explosion at a fertilizer plant in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP PhotoLM Otero)
Firefighters conduct a search and rescue of an apartment destroyed by an explosion at a fertilizer plant in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP Photo/LM Otero)
The remains of a fertilizer plant sits destroyed after an explosion in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP PhotoLM Otero)
The remains of a fertilizer plant sits destroyed after an explosion in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP Photo/LM Otero)
The remains of a fertilizer plant sits destroyed after an explosion in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP PhotoLM Otero)
The remains of a fertilizer plant sits destroyed after an explosion in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP Photo/LM Otero)
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Shown are the remains of a fertilizer plant destroyed by an explosion in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP PhotoLM Otero)
Shown are the remains of a fertilizer plant destroyed by an explosion in West, Texas, Thursday, April 18, 2013. A massive explosion at the West Fertilizer Co. killed as many as 15 people and injured more than 160, officials said overnight. (AP Photo/LM Otero)
A person looks on as emergency workers fight a house fire after a nearby fertilizer plant exploded Wednesday, April 17, 2013, in West, Texas. A massive explosion at the fertilizer plant near Waco on Wednesday night injured dozens of people and sent flames shooting into the night sky, leaving the factory a smoldering ruin following a blast that damaged buildings for blocks in every direction. (AP PhotoWaco Tribune Herald, Rod Aydelotte)
A person looks on as emergency workers fight a house fire after a nearby fertilizer plant exploded Wednesday, April 17, 2013, in West, Texas. A massive explosion at the fertilizer plant near Waco on Wednesday night injured dozens of people and sent flames shooting into the night sky, leaving the factory a smoldering ruin following a blast that damaged buildings for blocks in every direction. (AP Photo/Waco Tribune Herald, Rod Aydelotte)
Smoke fills the air after a fertilizer plant explosion Wednesday, April 17, 2013, in West, Texas. A massive explosion at the fertilizer plant near Waco on Wednesday night injured dozens of people and sent flames shooting into the night sky, leaving the factory a smoldering ruin following a blast that damaged buildings for blocks in every direction. (AP PhotoWaco Tribune Herald, Rod Aydelotte)
Smoke fills the air after a fertilizer plant explosion Wednesday, April 17, 2013, in West, Texas. A massive explosion at the fertilizer plant near Waco on Wednesday night injured dozens of people and sent flames shooting into the night sky, leaving the factory a smoldering ruin following a blast that damaged buildings for blocks in every direction. (AP Photo/Waco Tribune Herald, Rod Aydelotte)
Persons are seen pushing wheel chairs in front of a damaged nursing home following an explosion at a nearby fertilizer plant Wednesday, April 17, 2013, in West, Texas. An explosion at a fertilizer plant near Waco caused numerous injuries and sent flames shooting high into the night sky on Wednesday.(AP Photo Waco Tribune Herald, Rod Aydelotte)
Persons are seen pushing wheel chairs in front of a damaged nursing home following an explosion at a nearby fertilizer plant Wednesday, April 17, 2013, in West, Texas. An explosion at a fertilizer plant near Waco caused numerous injuries and sent flames shooting high into the night sky on Wednesday.(AP Photo/ Waco Tribune Herald, Rod Aydelotte)
An elderly person is assisted at a staging area at a local school stadium following an explosion at a fertilizer plant Wednesday, April 17, 2013, in West, Texas. An explosion at a fertilizer plant near Waco caused numerous injuries and sent flames shooting high into the night sky on Wednesday. (AP Photo Waco Tribune Herald, Rod Aydelotte)
An elderly person is assisted at a staging area at a local school stadium following an explosion at a fertilizer plant Wednesday, April 17, 2013, in West, Texas. An explosion at a fertilizer plant near Waco caused numerous injuries and sent flames shooting high into the night sky on Wednesday. (AP Photo/ Waco Tribune Herald, Rod Aydelotte)
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Emergency workers evacuate elderly from a damaged nursing home following an explosion at a fertilizer plant Wednesday, April 17, 2013, in West, Texas. An explosion at a fertilizer plant near Waco caused numerous injuries and sent flames shooting high into the night sky on Wednesday. (AP Photo Waco Tribune Herald, Rod Aydelotte)
Emergency workers evacuate elderly from a damaged nursing home following an explosion at a fertilizer plant Wednesday, April 17, 2013, in West, Texas. An explosion at a fertilizer plant near Waco caused numerous injuries and sent flames shooting high into the night sky on Wednesday. (AP Photo/ Waco Tribune Herald, Rod Aydelotte)
In this Instagram photo provided by Andy Bartee, a plume of smoke rises from a fertilizer plant fire in West, Texas on Wednesday, April 17, 2013. An explosion at a fertilizer plant near Waco Wednesday night injured dozens of people and sent flames shooting high into the night sky, leaving the factory a smoldering ruin and causing major damage to surrounding buildings. (AP PhotoAndy Bartee) MANDATORY CREDIT ANDY BARTEE
In this Instagram photo provided by Andy Bartee, a plume of smoke rises from a fertilizer plant fire in West, Texas on Wednesday, April 17, 2013. An explosion at a fertilizer plant near Waco Wednesday night injured dozens of people and sent flames shooting high into the night sky, leaving the factory a smoldering ruin and causing major damage to surrounding buildings. (AP Photo/Andy Bartee) MANDATORY CREDIT: ANDY BARTEE
Shattered glass covers items in the front of a thrift show after the West Fertilizer Company exploded April 18, 2013 in West, Texas. A massive explosion at the fertilizer company damaged buildings for blocks in every direction. (Photo by Chip SomodevillaGetty Images)
Shattered glass covers items in the front of a thrift show after the West Fertilizer Company exploded April 18, 2013 in West, Texas. A massive explosion at the fertilizer company damaged buildings for blocks in every direction. (Photo by Chip Somodevilla/Getty Images)
This video image porvided by KWTX-TV shows an injured woman from an explosion at a fertilizer plant near Waco Wednesday night April 17, 2013 being helped into a waiting ambulance in West Texas. The blast injured dozens of people and sent flames shooting high into the night sky, leaving the factory a smoldering ruin and causing major damage to surrounding buildings. (AP PhotoKWTX-TV)
This video image porvided by KWTX-TV shows an injured woman from an explosion at a fertilizer plant near Waco Wednesday night April 17, 2013 being helped into a waiting ambulance in West Texas. The blast injured dozens of people and sent flames shooting high into the night sky, leaving the factory a smoldering ruin and causing major damage to surrounding buildings. (AP Photo/KWTX-TV)
Rescue workers gather near a damaged apartment complex after a nearby fertilizer plant exploded Wednesday, April 17, 2013, in West, Texas. A massive explosion at the fertilizer plant near Waco on Wednesday night injured dozens of people and sent flames shooting into the night sky, leaving the factory a smoldering ruin following a blast that damaged buildings for blocks in every direction. (AP PhotoWaco Tribune Herald, Rod Aydelotte)
Rescue workers gather near a damaged apartment complex after a nearby fertilizer plant exploded Wednesday, April 17, 2013, in West, Texas. A massive explosion at the fertilizer plant near Waco on Wednesday night injured dozens of people and sent flames shooting into the night sky, leaving the factory a smoldering ruin following a blast that damaged buildings for blocks in every direction. (AP Photo/Waco Tribune Herald, Rod Aydelotte)
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This video image provided by WFAA-TV shows injured people being treated on the flood-lit the high school football field turned into a staging area after the blast in West Texas Wednesday April 17, 2013. (AP PhotoWFAA-TV)
This video image provided by WFAA-TV shows injured people being treated on the flood-lit the high school football field turned into a staging area after the blast in West Texas Wednesday April 17, 2013. (AP Photo/WFAA-TV)
Smoke fills the air after a fertilizer plant explosion Wednesday, April 17, 2013, in West, Texas. A massive explosion at the fertilizer plant near Waco on Wednesday night injured dozens of people and sent flames shooting into the night sky, leaving the factory a smoldering ruin following a blast that damaged buildings for blocks in every direction. (AP PhotoWaco Tribune Herald, Rod Aydelotte)
Smoke fills the air after a fertilizer plant explosion Wednesday, April 17, 2013, in West, Texas. A massive explosion at the fertilizer plant near Waco on Wednesday night injured dozens of people and sent flames shooting into the night sky, leaving the factory a smoldering ruin following a blast that damaged buildings for blocks in every direction. (AP Photo/Waco Tribune Herald, Rod Aydelotte)
A fire smokes near a fertilizer plant that exploded earlier in West, Texas, in this photo made early Thursday morning, April 18, 2013. (AP PhotoLM Otero)
A fire smokes near a fertilizer plant that exploded earlier in West, Texas, in this photo made early Thursday morning, April 18, 2013. (AP Photo/LM Otero)
Firefighters check a destroyed apartment complex near the fertilizer plant that exploded earlier in West, Texas, in this photo made early Thursday, April 18, 2013. (AP PhotoLM Otero)
Firefighters check a destroyed apartment complex near the fertilizer plant that exploded earlier in West, Texas, in this photo made early Thursday, April 18, 2013. (AP Photo/LM Otero)
This video image porvided by KWTX-TV shows some of the injured from an explosion at a fertilizer plant near Waco Wednesday night April 17, 2013 being pushed across the high school football field to waiting ambulances in West Texas. The blast injured dozens of people and sent flames shooting high into the night sky, leaving the factory a smoldering ruin and causing major damage to surrounding buildings. (AP PhotoKWTX-TV)
This video image porvided by KWTX-TV shows some of the injured from an explosion at a fertilizer plant near Waco Wednesday night April 17, 2013 being pushed across the high school football field to waiting ambulances in West Texas. The blast injured dozens of people and sent flames shooting high into the night sky, leaving the factory a smoldering ruin and causing major damage to surrounding buildings. (AP Photo/KWTX-TV)
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Firefighters us flashlights to search a destroyed apartment complex near a fertilizer plant that exploded earlier in West, Texas, in this photo made early Thursday, April 18, 2013. (AP PhotoLM Otero)
Firefighters us flashlights to search a destroyed apartment complex near a fertilizer plant that exploded earlier in West, Texas, in this photo made early Thursday, April 18, 2013. (AP Photo/LM Otero)
A fire still burns in a apartment complex destroyed near a fertilizer plant that exploded earlier in West, Texas, in this photo made early Thursday morning, April 18, 2013. (AP PhotoLM Otero)
A fire still burns in a apartment complex destroyed near a fertilizer plant that exploded earlier in West, Texas, in this photo made early Thursday morning, April 18, 2013. (AP Photo/LM Otero)
Firefighters search an area destroyed by a fertilizer plant explosion in West, Texas, in this photo made early Thursday morning, April 18, 2013. (AP PhotoLM Otero)
Firefighters search an area destroyed by a fertilizer plant explosion in West, Texas, in this photo made early Thursday morning, April 18, 2013. (AP Photo/LM Otero)
This video shows the fire at the plant, followed by an explosion. The volume gets very loud just after 29 seconds.
This video shows the fire at the plant, followed by an explosion. The volume gets very loud just after 29 seconds.
Emergency workers assist an elderly person at a staging area at a local school stadium Wednesday, April 17, 2013, in West, Texas. An explosion Wednesday night at a fertilizer plant near Waco sent flames shooting high into the night sky, leaving the factory a smoldering ruin, causing major damage at nearby buildings and injuring numerous people. (AP PhotoWaco Tribune Herald, Rod Aydelotte)
Emergency workers assist an elderly person at a staging area at a local school stadium Wednesday, April 17, 2013, in West, Texas. An explosion Wednesday night at a fertilizer plant near Waco sent flames shooting high into the night sky, leaving the factory a smoldering ruin, causing major damage at nearby buildings and injuring numerous people. (AP Photo/Waco Tribune Herald, Rod Aydelotte)
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An emergency worker walks through damaged apartment building following a fertilizer plant explosion Wednesday, April 17, 2013, in West, Texas. An explosion at a fertilizer plant near Waco Wednesday night injured dozens of people and sent flames shooting high into the night sky, leaving the factory a smoldering ruin and causing major damage to surrounding buildings. (AP PhotoWaco Tribune Herald, Rod Aydelotte)
An emergency worker walks through damaged apartment building following a fertilizer plant explosion Wednesday, April 17, 2013, in West, Texas. An explosion at a fertilizer plant near Waco Wednesday night injured dozens of people and sent flames shooting high into the night sky, leaving the factory a smoldering ruin and causing major damage to surrounding buildings. (AP Photo/Waco Tribune Herald, Rod Aydelotte)
A fire burns at a fertilizer plant in West, Texas after an explosion Wednesday April 17, 2013. (APMichael AinsworthThe Dallas Morning News)
A fire burns at a fertilizer plant in West, Texas after an explosion Wednesday April 17, 2013. (APMichael Ainsworth/The Dallas Morning News)
Rescue workers pass a damaged apartment complex after a nearby fertilizer plant exploded Wednesday, April 17, 2013, in West, Texas. (AP PhotoWaco Tribune Herald, Rod Aydelotte)
Rescue workers pass a damaged apartment complex after a nearby fertilizer plant exploded Wednesday, April 17, 2013, in West, Texas. (AP Photo/Waco Tribune Herald, Rod Aydelotte)
An apartment complex destroyed near explosion site. (roncorningTwitter)
An apartment complex destroyed near explosion site. (@roncorning/Twitter)
Elderly persons from a nearby nursing home are triaged in a parking lot before being moved to a school stadium following a fertilizer plant explosion Wednesday, April 17, 2013, in West, Texas. The explosion near Waco Wednesday night injured dozens of people and sent flames shooting high into the night sky, leaving the factory a smoldering ruin and causing major damage to surrounding buildings. (AP PhotoWaco Tribune Herald, Rod Aydelotte)
Elderly persons from a nearby nursing home are triaged in a parking lot before being moved to a school stadium following a fertilizer plant explosion Wednesday, April 17, 2013, in West, Texas. The explosion near Waco Wednesday night injured dozens of people and sent flames shooting high into the night sky, leaving the factory a smoldering ruin and causing major damage to surrounding buildings. (AP Photo/Waco Tribune Herald, Rod Aydelotte)
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A photo of the fire and damage from fertilizer plant explosion near Waco, Texas. (WacotribFacebook)
A photo of the fire and damage from fertilizer plant explosion near Waco, Texas. (@Wacotrib/Facebook)
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