U.S. Marines assigned to 1st Tank Battalion, Delta Company, Marine Corps Air Ground Combat Center Twentynine Palms (MCAGCC), Calif., perform sweeps with a compact metal detector during a mobilized operations course event in support of Integrated Training Exercise 2-15 at MCAGCC, Calif., Feb. 5, 2015. MCAGCC conducts relevant live-fire combined arms training, urban operations, and Joint/Coalition level integration training that promotes operational forces' readiness. (U.S. Air Force photo by Staff Sgt. Heather Cozad Staley/Released)