U.S. Army members from the 3rd Battlefield Coordination Detachment - Korea observe Republic of Korea Air Force Maj. Son, Sanghyun, the unit’s air and ground operations officer-in-charge, while he relays information to the Air Control Center during exercise Ulchi Freedom Guardian Aug. 21, 2015, at the Hardened Theater Air Control Center, Osan Air Base, Republic of Korea. The detachment is the Army’s only combined forces BCD comprised of combined forces. (U.S. Air Force photo/Airman 1st Class John Linzmeier)