Col. Mark Slocum, 4th Fighter Wing commander, cleans out a gas mask after participating in an Ability to Survive and Operate (ATSO) exercise, Aug. 25, 2015, at Seymour Johnson Air Force Base, North Carolina. Slocum wore mission-oriented protective posture gear and participated in the exercise alongside other Airmen during the ATSO rodeo. (U.S. Air Force photo/Airman Shawna L. Keyes)
Airman Shawna L. Keyes, U.S. Air Force
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