USMC Staff Sgt. Christopher Johnson (far right), F-35 Lightning II Joint Strike Fighter powerline instructor, discusses landing gear mechanics to students July 19, 2012 at Eglin Air Force Base, Fla. The USMC is modeling their F-35 maintenance training after the Air Force, standing up the Marines first-ever air field training detachment with the 372nd Training Squadron Detachment 19 at Eglin. (U.S. Air Force photo/Dan Hawkins)