U.S. Air Force firefighters respond to a simulated vehicle-borne improvised explosive device attack May 10, 2014, at Fort McCoy, Wis., in support of exercise Patriot Warrior 2014. United States military reserve components from all branches participate in combined exercises Patriot Warrior, Global Medic, Diamond Saber, and CSTX in preparation for upcoming deployments in joint environments. (U.S. Air Force photo by Master Sgt. Donald R. Allen/Released)