Airman becomes U.S. citizen
Airman 1st Class Carlo Santiago stands with other service members during the Presentation of Candidates Sept. 10, 2009, at the U.S. Military Naturalization Ceremony at the Pentagon. During the ceremony Secretary of Defense Robert Gates thanked the 31 service members for their service and Secretary of Homeland Security Janet Napolitano led them with the oath of allegiance. (U.S. Air Force Photo/Master Sgt. Stan Parker)