Airman Jaden Santos, 35th Security Forces Squadron, Misawa Air Base, Japan, installation entry controller, scans for opposing forces during readiness exercise Vigilant Ace 16 at Osan Air Base, Republic of Korea, Nov. 4, 2015. Santos is one of more than 1,000 augmentees participating in the large-scale exercise. Vigilant Ace 16 is peninsula-wide, providing ROK and U.S. armed forces the opportunity to hone resourceful skills used in the event of real-world contingencies. (U.S. Air Force photo by Senior Airman Kristin High/Released)