A tactical controller with Tactical Training Exercise Control Group observes as Marines with 1st Battalion, 7th Marine Regiment, fire at a target at Range 400 aboard Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., during 1/7’s night-time combined arms live-fire exercise Nov. 16, 2016. (Official Marine Corps photo by Cpl. Julio McGraw/Released) - A tactical controller with Tactical Training Exercise Control Group observes as Marines with 1st Battalion, 7th Marine Regiment, fire at a target at Range 400 aboard Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., during 1/7’s night-time combined arms live-fire exercise Nov. 16, 2016. (Official Marine Corps photo by Cpl. Julio McGraw/Released)