U.S. Army Soldiers, from the 11th Armored Regiment, drop a casualty with a simulated improvised explosive device attached, outside the rear entry control point of the 1st Stryker Brigade Combat Team, 25th Infantry Division staging area for Decisive Action Rotation 15-03 at the National Training Center, Fort Irwin, Calif., Jan. 16, 2015. The 11th ACR Soldiers act as opposition forces at the NTC to assist in training the nation’s military in various scenarios they may encounter in wartime operations. (U.S. Army photo by Spc. Ashley Marble/Released)