A U.S. Customs and Border Protection agent verifies the identification of a member of the French air force (FrAF) prior to the inaugural Trilateral Exercise, at Langley Air Force Base, Va., Dec. 1, 2015. Approximately 325 British Royal Air Force and FrAF personnel traveled to the U.S. to participate in the exercise. (U.S. Air Force photo by Senior Airman Aubrey White)