An F-35 aircraft arrives April 15 at Hill Force Base, Utah. The aircraft is the first Navy variant—designated “F-35C” —to arrive at the base where it will undergo depot modifications through the summer of 2016. The aircraft is assigned to U.S. Navy Strike Fighter Squadron 101 (VFA-101), Eglin AFB, Florida. (U.S. Air Force photo by R. Nial Bradshaw)