File photo of U.S. Army Gen. Petraeus and U.S. President Obama at event in the East Room of the White House

 
File photo of U.S. Army Gen. Petraeus and U.S. President Obama at event in the East Room of the White House
U.S. Army Gen. David Petraeus talks next to 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. REUTERS/Larry Downing