File photo of U.S. Marine Lt. Gen. Allen and U.S. President Obama at event in the East Room of the White House

 
File photo of U.S. Marine Lt. Gen. Allen and U.S. President Obama at event in the East Room of the White House
U.S. Marine Lt. Gen. John Allen shakes hands with U.S. President Barack Obama at an event in the East Room of the White House in this April 28, 2011 file photo during Obama's announcement that then CIA Director Leon Panetta would be nominated as Secretary of Defense. Former CIA Director David Petraeus will testify November 16, 2012 on Capitol Hill about the recent attack on the U.S. diplomatic mission in Benghazi, Libya, but is also expected to be asked about his resignation last week over an extramarital affair. An FBI investigation revealed Petraeus' affair with his biographer Paula Broadwell. The probe also ensnared Allen, the commander of NATO forces in Afghanistan, whom agents found had exchanged "flirtatious" emails with Kelley, law enforcement officials said. REUTERS/Larry Downing