Airmen from the 35th Civil Engineer Squadron observe a Japan Air Self-Defense Force rapid runway repair exhibition during a bilateral exchange event at Misawa Air Base, Japan, June 22, 2017. This is phase one of a RRR, which fills in a crater or hole with gravel. The exchange focused on base recovery, which ensures infrastructure and airfields remain operational if a natural disaster or an attack occurs. (U.S. Air Force photo by Senior Airman Deana Heitzman)