By JOSH LEDERMAN
(AP) - The top U.S. and NATO commander of the war in Afghanistan has returned to work in Kabul, more than a week after being drawn in to a sex scandal that led retired Army Gen. David Petraeus to resign as CIA director and saw the Pentagon order a review of ethics training for senior officers. Here is an updated timeline of the scandal, according to officials involved in the investigation:
Spring 2006 _ Paula Broadwell meets Petraeus at Harvard University, where she is a graduate student. Petraeus is a lieutenant general working on a counterinsurgency manual and is invited to speak about his experiences in Iraq.
January 2007 _ The Senate confirms Petraeus as the commanding general for U.S. troops in Iraq.
2008 _ Broadwell starts studying Petraeus' leadership. On a visit to Washington, Petraeus invites Broadwell to join him and his team for a run along the Potomac River.
October 2008 _ Petraeus is named commander of U.S. Central Command, based at MacDill Air Force Base near Tampa, Fla., where socialite Jill Kelley and her husband attend events alongside the area's military elite.
June 30, 2010 _ The Senate confirms Petraeus as the new commander for war in Afghanistan. Over the next year, Broadwell expands her research of Petraeus into an authorized biography. She makes multiple trips to Afghanistan and is given unprecedented access to Petraeus and his commanders.
Sept. 6, 2011 _ Petraeus is sworn in as CIA director with his wife, Holly, by his side. Broadwell keeps in contact with Petraeus and is later invited to join him for events. She continues to interview him, sometimes during morning runs at the CIA and occasionally in his 7th floor office.
Fall 2011 _ Jill Kelley attends an FBI "Citizens' Academy" in Florida, where Frederick W. Humphries, a veteran FBI counterterrorism investigator, gives a lecture.
November 2011 _ Petraeus begins an extramarital affair with Broadwell, according to retired Army Col. Steve Boylan.
January 2012 _ Broadwell's biography, "All In: The Education of General David Petraeus," is released. In an interview with her hometown paper, the Bismarck (N.D.) Tribune, Broadwell describes Petraeus as an inspirational figure who always takes care of his subordinates.
May 2012 _ Anonymous emails, ultimately traced to Broadwell, were sent to Gen. John Allen, the top U.S. commander in Afghanistan, and several other generals warning them to stay away from Kelley, the Florida socialite. The emails came from the pseudonym "Kelleypatrol" and included notes on Allen's plans to see Kelley in Washington the following week. Concerned about how anyone else would know about his personal plans, Allen forwarded the emails to Kelley to see whether she was playing a prank on them. Other generals also forward to Kelley copies of emails they received.
Early June 2012 _ Kelley begins receiving additional emails directly from various anonymous email accounts claiming she's up to no good. One email mentions Petraeus and an upcoming social event in Washington.
June 2012 _ Kelley discusses the emails with Humphries, the FBI agent, leading to an investigation. FBI agents are concerned that the sender of the emails is tracking the movements of Allen and Petraeus.
July 2012 _ The affair between Petraeus and Broadwell ends, according to Petraeus' friend Boylan. Because of the sensitive nature of the investigation involving security issues, FBI and Justice Department officials are notified, including FBI Director Robert Mueller. Attorney General Eric Holder is notified around this time.
August 2012 _ Humphries tells Kelley he's been removed from the case and complains that the FBI is moving too slowly. Meanwhile, another FBI agent involved in the investigation tells Kelley the FBI has traced the emails to Broadwell, whom Kelley has never met.
Late summer 2012 _ Emails between Petraeus and Broadwell lead agents to believe the two are having an affair.
Late September _ The FBI conducts the first of its two interviews with Broadwell. By this time, the FBI has long since concluded that none of Petraeus' computers had been hacked and that Petraeus was not involved in the cyber harassment of Kelley. After Broadwell was interviewed, agents search her computers and find substantial amounts of classified documents _ a discovery that shifted the focus of the investigation.
October 2012 _ FBI agents spend most of the month trying to resolve issues related to the classified documents that Broadwell has _ working with the Pentagon to assess where she got them, their significance and whether she was authorized to have them.