Vigilant Ace 16: Defenders simulate OpFor attacks
Staff Sgt. Raymond Burk, 35th Security Forces Squadron, Misawa Air Base, Japan, base defense operations center controller, watches an A-10 Thunderbolt II fighter aircraft prepare to take off during readiness exercise Vigilant Ace 16 on Osan Air Base, Republic of Korea, Nov. 4, 2015. Throughout the week-long, peninsula-wide exercise, more than 16,000 participants demonstrated the ability to operate in a chemical environment as well as administer self-aid buddy care during a wartime environment. These defenders highlighted their ability to position, employ and sustain forces and showcase operational readiness. (U.S. Air Force photo/Senior Airman Kristin High)