U.S. Air Force Lt. Col. August Marquardt, Air Combat Command F-35 Lightning requirements officer, dons his helmet before piloting a T-38 Talon for a training mission at Langley Air Force Base, Va., Nov. 17, 2014. Talons act as adversary fighters to the F-22 Raptors during training. (U.S. Air Force photo by Senior Airman Austin Harvill/Released)