F-35 Lightning II
Capt. Derek Kirkwood, a pilot assigned to the 34th Fighter Squadron, dons his helmet in the cockpit of an F35A Lightning II aircraft April 22 at Hill Air Force Base, Utah. The sortie, the first F-35A 4-ship generation at the base, was part of a cross-ramp exercise and was a major test for the active duty 388th Fighter Wing and Reserve 419th Fighter Wing. The exercise helped identify process deficiencies before testing the F-35's operational agility at Mountain Home AFB, Idaho, in June. (U.S. Air Force photo by Paul Holcomb)