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)

Lance Cpl. Jose Marroquin, electrical optical ordnance repair, 1st Battalion, 7th Marine Regiment, projects his ping pong using a make-shift sling shot during a 3D printing class aboard Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., Nov. 16, 2016. Over the three-day course, Marines were challenged to manufacture innovative solutions for the problems presented to them using 3D printing innovation. (Official Marine Corps photo by Cpl. Medina Ayala-Lo/Released) - Lance Cpl. Jose Marroquin, electrical optical ordnance repair, 1st Battalion, 7th Marine Regiment, projects his ping pong using a make-shift sling shot during a 3D printing class aboard Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., Nov. 16, 2016. Over the three-day course, Marines were challenged to manufacture innovative solutions for the problems presented to them using 3D printing innovation. (Official Marine Corps photo by Cpl. Medina Ayala-Lo/Released)

Lance Cpl. Kenneth Martin, food service specialist, Headquarters Battalion, places lobster tails in the oven during preparation for the Marine Corps birthday meal at Phelps Mess Hall, Nov. 10, 2016. The Marine Corps’ birthday is one of the many traditions that Marines take great pride in celebrating annually. (Official Marine Corps photo be Cpl. Medina Ayala-Lo/Released) - Lance Cpl. Kenneth Martin, food service specialist, Headquarters Battalion, places lobster tails in the oven during preparation for the Marine Corps birthday meal at Phelps Mess Hall, Nov. 10, 2016. The Marine Corps’ birthday is one of the many traditions that Marines take great pride in celebrating annually. (Official Marine Corps photo be Cpl. Medina Ayala-Lo/Released)