U.S. Army Capt. Robyn Boehringer, left, the commander of Foxtrot Company, 2nd Battalion, 504th Infantry Regiment, 1st Brigade Combat Team, 82nd Airborne Division, lifts her field protective mask from her face during annual chemical agent training at Fort Bragg, N.C., April 29, 2013. Boehringer entered the CS gas chamber with each squad of Soldiers completing the exercise.  (U.S. Army photo by Staff Sgt. Mary Katzenberger/Released)
Staff Sgt. Mary Katzenberger
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