Airmen from the 621st Contingency Response Group pack supplies onto a pallet in preparation to redeploy at Prince Sultan Air Base, Kingdom of Saudi Arabia, July 27, 2019. Most construction and deconstruction operations take place at night to avoid heat-related complications. The 621st CRG deployed for an air base opening mission in response to the White House authorization of approximately 1,000 additional troops in U.S. Central Command's area of responsibility for defensive purposes to address air, naval, and ground-based threats in the Middle East. (U.S. Air Force photo by Staff Sgt. Sarah Brice)