Mississippi Army National Guard Sgt. Bryan Dupont, right, a flight engineer with Bravo Company, 1st Battalion, 111th Aviation Regiment, adjusts the gas mask of a Soldier during a Chemical, Biological, Radioactive and Nuclear Defense training exercise on April 26, 2014, at the Combat Readiness Training Center, Gulfport, Miss. The exercise is just one of the tasks the unit will complete during their annual training. (U.S. Army National Guard photo by Spc. Jovi M. Prevot, 102nd Mobile Public Affairs Detachment)