Students learn about F-35 Lightning II Joint Strike Fighter landing gear from Marine Staff Sgt. Christopher Johnson, right, during training at Eglin Air Force Base, Fla., Jul. 19, 2012. The USMC is standing up their first-ever field training detachment with the 372nd Training Squadron Detachment 19 at Eglin, part of the 982nd Training Group at Sheppard Air Force Base, Texas. (U.S. Air Force photo/Dan Hawkins)