U.S. Air Force Staff Sgt. Jeff Howard, 8th Operations Support Squadron air traffic controller, dons his mission-oriented protective posture level four equipment as part of a regularly-scheduled operational readiness exercise, Beverly Pack 17-3, at Kunsan Air Base, Republic of Korea, Aug. 23, 2017. Air traffic control’s ability to carry out the duties of directing pilots in takeoff and landing, even in response to a chemical, biological, radiological or nuclear attack, plays a vital role in the 8th Fighter Wing’s abilities to defend the Korean peninsula. (U.S. Air Force photo by 2nd Lt Brittany Curry/Released)