Brig. Gen. Scott Pleus, the 56th Fighter Wing commander, lands the flagship F-35 Lightning ll at Luke Air Force Base, Ariz., April 28, 2015. The flagship's arrival coincides with the start of Luke’s F-35 student pilot training, which begins in May. Luke now has 20 U.S. F-35s and two from the Royal Australian Air Force. (U.S. Air Force photo/Senior Airman Devante Williams)