Staff Sgt. Denton Gladden, a firefighter with the 514th Civil Engineer Squadron, zips up his Mission-Oriented Protective Posture gear during a Chemical, Biological, Radiological and Nuclear exercise at the Combat Readiness Training Center at Gulfport, Mississippi, in support of Crisis Response 2017 March 7, 2017. Close to 700 AMC Airmen from the 514th Air Mobility Wing, 305th Air Mobility Wing, 87th Air Base Wing, and the 621st Contingency Response Wing at Joint Base McGuire-Dix-Lakehurst, N.J., are participating in the mobilization exercise Crisis Response 2017. The primary goal of this exercise is for the four wings to deploy to an austere location and set up and sustain combat air mobility operations. (U.S. Air Force photo by Master Sgt. Mark C. Olsen/Released)