U.S. President Barack Obama reacts after answering questions about the attack on the U.S. embassy in Benghazi, Libya, during a joint news conference with Britain's Prime Minister David Cameron (not ... more 

U.S. President Barack Obama reacts after answering questions about the attack on the U.S. embassy in Benghazi, Libya, during a joint news conference with Britain's Prime Minister David Cameron (not pictured) in the East Room of the White House in Washington, May 13, 2013. REUTERS/Jonathan Ernst less