Iain Harrison, the first season winner of the History Channel's "Top Shot," recites the U.S. Citizenship and Immigration Services' Oath of Allegiance as recited by Anne Arries Corsano, USCIS District 20 district director, aboard a C-17 Globemaster III Dec. 3, 2011 at Joint Base Lewis-McChord, Wash. Tech. Sgts. John Wulff, 446th Security Forces Squadron, and Juan Naputi, 446th Aircraft Maintenance Squadron, witness the ceremony along with several other members of the 446th Airlift Wing. Harrison first set foot on McChord Field as a member of the British Army twenty years earlier and returned to take the oath to become an American citizen. (U.S. Air Force photo by Tech. Sgt. Tanya King/Released)