Senior Airman Udoka Addy, 379th Expeditionary Maintenance Squadron, applies rivets to a generator door during routine aerospace ground equipment repairs May 7, 2015 at Al Udeid Air Base, Qatar. Aircraft Ground Equipment airmen rotate shifts to ensure day and night operations are supplied with functioning equipment. These airmen endure heat that sometimes reaches above 100 degrees Fahrenheit causing them to sometimes work in black flag conditions. (U.S. Air Force photo by Staff Sgt. Alexandre Montes)