Marine Responders Fitness test
Staff Sgt. Eva Gaus, a member of the 51st Civil Engineers Emergency Managers Team, ecstatically breathes in fresh air after completing her run through of the second Annual Marine Responders Fitness Test, March 20, 2015 at Osan Air Base, Republic of Korea. The four participating teams suited up in two types of full class B CBRNE protection suits to perform a series of tasks, gaining points for speed and oxygen conservation.
(USAF photo by Staff Sgt. Amber Grimm)