Airmen from the 37th Bomb Squadron sit in plastic sheets prior to decontamination during the Phase II portion of an operational readiness exercise at Ellsworth Air Force Base, S.D., July 10, 2013. The bags are one of several stations requiring Airmen to remove articles of gear and clothing to safely decontaminate themselves and to prevent further contamination of harmful chemicals to the area. (U.S. Air Force photo by Airman 1st Class Rebecca Imwalle/Released)