Tactical Exercise U.S. Marines carry a simulated casualty during a tactical exercise to recover aircraft and personnel at an undisclosed location in Southwest Asia, Dec. 28, 2015. The Marines are assigned to 1st Battalion, 7th Marine Regiment, Special Purpose Marine Air-Ground Task Force-Crisis Response Central Command. U.S. Marine Corps photo by Lance Cpl. Clarence Leake SHARE: Download: Full Size (2.04 MB) Credit: Lance Cpl. Clarence Leake VIRIN: 151228-M-NF116-108.JPG Photo Gallery