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. AP Photo logo AP Photo 15 months ago

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.