Senior Airman Bryant Ash, 99th Communication Squadron, puts on protective gloves during the chemical, biological, radiological and nuclear defense survival skills training course at Nellis Air Force Base, Nev., April 30, 2015. The training course is mandatory for Airmen who are deploying, going TDY, or making a permanent change of station to an area outside of the continental United States. (U.S. Air Force photo by Airman 1st Class Jake Carter)