Members of the first ever F-35 Lightning II heritage flight team from Luke Air Force Base, Ariz., participate in the Heritage Flight Conference at Davis-Monthan Air Force Base, Ariz., March 4-6, 2016. The Heritage Flight Program features modern Air Force fighter aircraft flying alongside World War II, Korean and Vietnam-era aircraft in a dynamic display of the nation's airpower history. (U.S. Air Force photo/Staff Sgt. Staci Miller)