LANGLEY AIR FORCE BASE, Va. – Capt. David Kierein, 64th Aggressor Squadron pilot, hands his helmet bag to Airman 1st Class Leland Mullenax, 57th Aircraft Maintenance Squadron crew chief, after a training exercise held here Sept. 17. Members of the 57th AMXS provided maintenance for the 64th AGRS. The 64th AGRS was here to provide dissimilar aircraft training to Langley pilots. Both squadrons are from Nellis Air Force Base, Nev. (U.S. Air Force photo/Tech. Sgt. April Wickes)