Defenders hone combat readiness
U.S. Air Force Staff Sgt. Prince Johnson, 51st Security Forces Squadron Defender, dons his gas mask during a field training exercise at Osan Air Base, Republic of Korea, March 23, 2017. Johnson was part of a group of Defenders who went through the 51st SFS Combat Readiness Course, a 10-day program that covers basic and advanced contingency operations and base-specific defense tactics, including the use of Mission Oriented Protective Posture gear. (U.S. Air Force photo by Staff Sgt. Victor J. Caputo)

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Photo by: Staff Sgt. Victor J. Caputo |  VIRIN: 170323-F-AM292-1159.JPG