Tech. Sgt. Douglas Bard, 362nd Training Squadron instructor, shows Airman Sean Muffett, 362nd TRS F-15 Eagle crew chief apprentice course student, how to ensure the resting gear is in place at Sheppard Air Force Base, Texas, Dec. 14, 2017. Muffett is in block five of six and scheduled to graduate Jan. 30, 2018. (U.S. Air Force photo by Alan R. Quevy)