Maj. Rolf Holmquist, 99th Air Base Wing deputy chaplain, inspects a gas mask during a chemical, biological, radiological and nuclear defense survival skills training course on Nellis Air Force Base, Nev., April 30, 2015. A gas mask inspection should be performed every six months when not in a combat zone or every seven days while in a combat zone. (U.S. Air Force photo by Airman 1st Class Mikaley Towle)
Airman 1st Class Mikaley Towle
Taken on 30 April 2015
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