U.S. President Barack Obama shakes hands with U.S. Air Force personnel as he departs from South Korea, after the 2012 Nuclear Security Summit

 
U.S. President Barack Obama shakes hands with U.S. Air Force personnel as he departs from South Korea, after the 2012 Nuclear Security Summit
U.S. President Barack Obama shakes hands with U.S. Air Force personnel as he departs from South Korea at Osan Air Base in Seoul March 27, 2012, after attending the 2012 Nuclear Security Summit. REUTERS/Larry Downing (SOUTH KOREA - Tags: POLITICS MILITARY)