Cpl. Milton Trejo recites the oath of allegiance. U.S. Marine Corps Cpl. Milton Trejo, from San Salvador, El Salvador, recites the oath of allegiance during a U.S. Citizenship and Immigration Services swearing-in ceremony aboard the USS Ronald Reagan (CVN 76) in Coronado, Calif., on Aug. 22, 2006. More than 85 service members from the Navy, Marine Corps, Army and Coast Guard from 29 countries around the world participated in the naturalization ceremony aboard the aircraft carrier. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 490650-Q-ICG13-899.jpg Photo Gallery