Gas Gas Gas Soldiers wait for the order to remove their protective masks and expose themselves to tear gas during chemical, biological, radiological and nuclear defense training at Joint Base Elmendorf-Richardson, Alaska, April 13, 2016. Air Force photo by Justin Connaher SHARE: Download: Full Size (1.64 MB) Tags: NBC Training, CG Gas, Joint Base Elmendorf-Richardson, 25th infantry division, Soldiers Credit: Justin Connaher VIRIN: 160413-F-LX370-855A.JPG Photo Gallery