This picture released by U.S. Combined Security Transition Command Afghanistan shows U.S. Democratic presidential candidate Sen. Barack Obama, right, shakes hands with a U.S. soldier of Combined Security Transition Command in Afghanistan during a visit to Camp Eggers in Kabul, Afghanistan, Sunday, July 20, 2008. Obama visited with U.S. troops and Afghan officials in this war-weary nation, which is the focal point of his proposed strategy for dealing with threats to the U.S. if elected president.