U.S. Marine Staff Sgt. Carlos Rodriguez guides a concrete truck backward during a road improvement project with Joint Task Force North in El Centro, Calif., April 19, 2016. Rodriguez is the staff non-commissioned officer in charge of Headquarters and Support Company, 7th Engineer Support Battalion. For the last two months, the Marines have been processing and leveling dirt to improve the road’s quality as well as constructing low-water crossings to maintain the integrity of the road during wet conditions. (U.S. Marine Corps photo by Cpl. Carson Gramley/released) - U.S. Marine Staff Sgt. Carlos Rodriguez guides a concrete truck backward during a road improvement project with Joint Task Force North in El Centro, Calif., April 19, 2016. Rodriguez is the staff non-commissioned officer in charge of Headquarters and Support Company, 7th Engineer Support Battalion. For the last two months, the Marines have been processing and leveling dirt to improve the road’s quality as well as constructing low-water crossings to maintain the integrity of the road during wet conditions. (U.S. Marine Corps photo by Cpl. Carson Gramley/released)

U.S. Marine Lt. Gen. David A. Berger speaks to the Marines of 1st Maintenance Battalion, Combat Logistics Regiment 15, 1st Marine Logistics Group, after a demonstration on 3-D printing technology aboard Camp Pendleton, Calif., April 6, 2016. Berger is the commanding general of I Marine Expeditionary Force. The battalion demonstrated the potential of 3-D printing capabilities to the commanders of I MEF and 1st MLG. Still in the testing phase with the printers, the battalion has already discovered endless possibilities as to how they can integrate the technology into their mission. (U.S. Marine Corps photo by Cpl. Carson Gramley/released) - U.S. Marine Lt. Gen. David A. Berger speaks to the Marines of 1st Maintenance Battalion, Combat Logistics Regiment 15, 1st Marine Logistics Group, after a demonstration on 3-D printing technology aboard Camp Pendleton, Calif., April 6, 2016. Berger is the commanding general of I Marine Expeditionary Force. The battalion demonstrated the potential of 3-D printing capabilities to the commanders of I MEF and 1st MLG. Still in the testing phase with the printers, the battalion has already discovered endless possibilities as to how they can integrate the technology into their mission. (U.S. Marine Corps photo by Cpl. Carson Gramley/released)

Nathan Aldaco, a 12 year-old boy with hypoplastic left heart syndrome, and his family, pose for a picture with Explosive Ordnance Disposal Marines during a Make-A-Wish event supported by 7th Engineer Support Battalion, 1st Marine Logistics Group, aboard Camp Pendleton, Calif., March 24, 2016. Marines with 7th ESB and Explosive Ordnance Disposal helped to make Nathan’s wish of becoming a Marine come true by demonstrating the capabilities of their EOD robots and detonating TNT, C4, dynamite and blasting caps, while the heavy equipment operators gave him the opportunity to ride the D7 dozer and the excavator, in which he dug a pit, built a berm, and broke several large tree trunks. (U.S. Marine Corps photo by Sgt. Laura Gauna/released) - Nathan Aldaco, a 12 year-old boy with hypoplastic left heart syndrome, and his family, pose for a picture with Explosive Ordnance Disposal Marines during a Make-A-Wish event supported by 7th Engineer Support Battalion, 1st Marine Logistics Group, aboard Camp Pendleton, Calif., March 24, 2016. Marines with 7th ESB and Explosive Ordnance Disposal helped to make Nathan’s wish of becoming a Marine come true by demonstrating the capabilities of their EOD robots and detonating TNT, C4, dynamite and blasting caps, while the heavy equipment operators gave him the opportunity to ride the D7 dozer and the excavator, in which he dug a pit, built a berm, and broke several large tree trunks. (U.S. Marine Corps photo by Sgt. Laura Gauna/released)