U.S. Soldiers assigned to the 520th Area Support Medical Company and 349th Chemical Company work together to prepare casualties for decontamination after a simulated chemical plant explosion during a Defense Chemical, Radiological, Biological, Nuclear, and Explosive Response Force evaluation at Joint Base Lewis-McChord, Wash., June 27, 2013. (U.S. Army photo by Sgt. Sarah E. Enos/Released)