U.S. Air Force firefighters with the 433rd Civil Engineering Squadron (CES) and the 512th CES prepare to put out a controlled fire for training purposes May 2, 2014, during exercise Patriot Warrior at Fort McCoy, Wis. Patriot Warrior is a joint reserve component exercise designed to prepare reserve members of all branches for upcoming deployments.
(DoD photo by Staff Sgt. Joseph Araiza, U.S. Air Force/Released). Original public domain image from Flickr