Marines with 4th Law Enforcement Battalion, Force Headquarters Group, Marine Forces Reserve, rush into the cell of a non-compliant inmate in an attempt to restrain him during detainee operations training at the Muscatatuck Urban Training Center in Butlerville, Ind., June 14, 2016. The Marines conducted drills on different scenarios and learned how to run and sustain a prison safely and effectively. (U.S. Marine Corps photo by Lance Cpl. Melissa Martens/ Released)