Lance Cpl. Casey Hall, a motor transport vehicle operator with Headquarters and Service Company, 2nd Tank Battalion, searches for targets down range behind an M240B medium machine gun during a field exercise at Marine Corps Base Camp Lejeune, North Carolina, April 29, 2016. Marines began the exercise by firing the M240B medium machine gun and .50-caliber machine gun from tripods before mounting them on a moving Humvee. - Lance Cpl. Casey Hall, a motor transport vehicle operator with Headquarters and Service Company, 2nd Tank Battalion, searches for targets down range behind an M240B medium machine gun during a field exercise at Marine Corps Base Camp Lejeune, North Carolina, April 29, 2016. Marines began the exercise by firing the M240B medium machine gun and .50-caliber machine gun from tripods before mounting them on a moving Humvee.