Lt. Col. Michael Gette, 61st Fighter Squadron commander, shows Lt. Gen. Darryl Roberson, commander of Air and Education Training Command, the new helmet for F-35 pilots at Luke Air Force Base, Ariz., Dec. 3, 2015. Roberson toured the Academic Training Center and the 61st Fighter Squadron to see the progress of F-35 training. (U.S. Air Force photo by Senior Airman James Hensley)