A U.S. Marine Corps ground crewman gives the thumbs up to the pilot of a F-35B Lightning II
A U.S. Marine Corps ground crewman gives the thumbs up to the pilot of a F-35B Lightning II at Eglin Air Force Base, Fla., on May 25, 2013. Marine Fighter Attack Training Squadron 501 is conducting training and operations in the F-35B with joint and coalition partners.