U.S. Marines practice coordinated movement techniques - U.S. Marines with Special Reaction Team, Provost Marshall’s Office, Marine Air Ground Task Force Training Command, practice coordinated movement techniques during an SRT familiarization range at Marine Corps Air Ground Combat Center, Twentynine Palms, California, Dec. 11, 2020. SRT Marines are military police officers trained in hostage situation, active shooter and barricaded suspect response. (U.S. Marine Corps photo by Lance Cpl. Joshua Sechser)