Crew chiefs assigned to the 432nd Aircraft Maintenance Squadron perform preflight checks on an MQ-9 Reaper prior to its departure in support of Red Flag 16-03 July 19, 2016, at Creech Air Force Base, Nevada. Red Flag is a combat training exercise with emphasis on warfare tactics such as intelligence, electronic warfare, and night missions. (U.S. Air Force photo by Airman 1st Class James Thompson/Released)