An F-35 Lightning II from the 34th Fighter Squadron at Hill Air Force Base, Utah, lands at Royal Air Force Lakenheath, England, April 19, 2017. This training deployment allows the U.S. Air Force to further demonstrate the operational capabilities of the aircraft, and also assists in refining the bed-down requirements for the F-35A at Lakenheath which is scheduled to receive the aircraft in the early 2020s. (U.S. Air Force photo/Staff Sgt. Emerson Nuñez)