During a Rapid Airfield Damage Recovery training event July 21, 2021, at the Silver Flag Training Site at Tyndall Air Force Base, Florida, a four-member crew of Airmen execute the final step of the RADR process. After pouring 10 inches of rapid setting concrete over the top of flowable fill inside of a simulated battle-damaged crater, the Airmen smooth out the surface to complete the capping step of the process. Just 15 minutes after this is completed, the runway will be ready for aircraft. (U.S. Air Force photo by Emily Mifsud)