US Democratic presidential candidate Obama gestures as he walks off stage after speaking at the AIPAC policy conference in Washington

 
US Democratic presidential candidate Obama gestures as he walks off stage after speaking at the AIPAC policy conference in Washington
U.S. Democratic presidential candidate Senator Barack Obama (D-IL) gestures as he walks off stage after speaking at the American Israel Public Affairs Committee (AIPAC) policy conference in Washington June 4, 2008. Obama said on Wednesday Iran posed a serious threat in the Middle East and vowed to stop it from acquiring a nuclear weapon at the pro-Israel lobby group's conference. REUTERS/Jason Reed (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)