Tech Sgt. Luis Alvarado, 36th Civil Engineer Squadron water and fuels systems operator, gears up during the Ability to Survive and Operate training at Andersen Air Force Base, Guam, March 15, 2013. The training ranged from decontamination, transition points, chemical gear wear check, self-aid and buddy care, unexploded ordnance identification, land-mobile radio, and also M-16 assembly training. (U.S. Air Force photo by Airman 1st Class Adarius Petty/Released)