U.S. Air Force Airman 1st Class Thomas Doane, left, guidance and control apprentice, and Senior Airman Tony Nguyen, guidance and control journeyman, both assigned to the 340th Expeditionary Aircraft Maintenance Unit, prepare to solder a power control relay on a KC-135 Stratotanker at Al Udeid, Air Base, Qatar, July 7, 2017. The members of the 340th and 22nd EAMUs face minute-by-minute challenges in the sweltering heat on the runway as they work to keep a fleet of KC-135 Stratotankers ready to fly. (U.S. Air National Guard photo by Tech. Sgt. Bradly A. Schneider/Released)