WASHINGTON (AP) -- President Barack Obama had gone to his residence after a difficult week when an urgent email brought him rushing back to the Oval Office. The suspect in the Boston bombings had been apprehended.
"They have him in custody, it is white hat," White House counterterrorism adviser Lisa Monaco wrote chief of staff Denis McDonough. That was reference to the cap that 19-year-old Dzhokhar Tsarnaev was seen wearing in surveillance video that led to his capture.
Soon Monaco was briefing the president on developments.
Elsewhere in the West Wing, Tsarnaev's apprehension got White House counsel Kathryn Ruemmler thinking about what legal rights the suspect should have. She consulted with the FBI on the legal rationale to initially question Tsarnaev without notifying the suspect of his Miranda rights, to quickly learn whether anyone else was in danger, and she advised Obama on the conclusion not to prosecute him as an enemy combatant.
For Monaco and Ruemmler, the events were another step in more than a decade of teamwork for friends who first met amid the shock and confusion of the Sept. 11 attacks and worked together as prosecutors and at the top levels of the Justice Department.
The Boston bombings were Monaco's first high-profile test since she replaced John Brennan, the current CIA director, as Obama's homeland security and counterterrorism adviser.
She was the first to brief the president on an attack that hit close to home for her. Monaco is from the Boston suburbs, she graduated from Harvard and her brother lives near the finish line, but was unharmed.
Monaco kept Obama updated day and night, along with developments in the investigation of possible poisonous letters sent to the president and the Senate, and the explosion that killed 14 in a small Texas town.
Ruemmler, who joined the White House in 2010, has become a trusted member of Obama's tight-knit inner circle, a rarity in a White House that has proved difficult to navigate for outsiders.
When Obama attended a memorial service in Boston on April 18, Ruemmler went along to keep him prepared to respond to any developments in the investigation. Tsarnaev was captured the next night, and Ruemmler updated Obama on the FBI's decision to have agents interview the hospitalized prisoner before notifying him of his right to remain silent under the public safety exception.
Ruemmler also advised Obama on the debate over whether to prosecute Tsarnaev as an enemy combatant before a military tribunal. She helped conclude that wasn't an option because Tsarnaev is a naturalized U.S. citizen entitled to a federal trial.
The issues are familiar for Ruemmler, 42, and Monaco, 45, who for years have been at the heart of the country's battle against the terrorism threat.
As director of the Justice Department's national security division for the past couple years, Monaco approved the prosecution and requests for secret surveillance of suspected terrorists. From the White House, she is now responsible for helping determine the targets of drone attacks.
Ruemmler oversees legal strategy on the drone strikes and handling of terrorism suspects at Guantanamo Bay, Cuba, along with every other important legal issue for Obama.
The women have worked closely together since their days as assistant U.S. attorneys in the District of Columbia, where they rose from the entry level of prosecuting misdemeanors to the high-profile Enron Task Force.
They met in a training class along with Ann Petalas, who remains friends with them. She recalls when their instructors' pages started going off simultaneously early on the second day of class.
Monaco left the room to check what was happening, and returned to announce that a hijacked plane had flown into the World Trade Center, Petalas said. Soon the devastation hit much closer to home.
"We were on the ninth floor, and I remember seeing smoke rising" over Washington, Petalas said. "And we weren't sure whether it was the Pentagon or the White House at the time."
But it was clear Washington had been hit, and their office was evacuated in fear the hijackers might target another federal building. Like many people in those cities gripped by terror that day, they took off with no instruction where to go. Petalas said she and Ruemmler fled northwest on foot.
Monaco and Ruemmler declined to be interviewed for this story.
But in a speech on the 10th anniversary of the Sept. 11 attacks, Monaco spoke of the importance of remembering that day "not only as a turning point in history, but as a human tragedy with flesh-and-blood victims, heroes and murderers."