U.S. Air Force Staff Sgt. Michael Perry (right), 604th Air Support Operations Squadron tactical air control party, evaluates and instructs a Republic of Korea Air Force joint terminal attack controller during JTAC simulated system training at Osan Air Base, Republic of Korea, Sept. 25, 2019. The system utilizes most of the equipment a JTAC operates while conducting close air support operations. (U.S. Air Force photo by Staff Sgt. Ramon A. Adelan)