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 at Marine Corps Air Ground Combat Center, Twentynine Palms, California, during 1/7’s night-time combined arms live-fire exercise Nov. 16, 2016. - 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 at Marine Corps Air Ground Combat Center, Twentynine Palms, California, during 1/7’s night-time combined arms live-fire exercise Nov. 16, 2016.