The 3-D printer from 2nd Battalion, 8th Marine Regiment prints pack clips at Camp Lejeune, N.C., Oct. 6, 2017. 2/8 is the first infantry battalion in the United States Marine Corps to utilize a 3-D printer to ensure battalion readiness in the event of equipment malfunctions. (U.S. Marine Corps photo by Lance Cpl. Ashley McLaughlin) - The 3-D printer from 2nd Battalion, 8th Marine Regiment prints pack clips at Camp Lejeune, N.C., Oct. 6, 2017. 2/8 is the first infantry battalion in the United States Marine Corps to utilize a 3-D printer to ensure battalion readiness in the event of equipment malfunctions. (U.S. Marine Corps photo by Lance Cpl. Ashley McLaughlin)

Marines with 2nd Battalion, 8th Marine Regiment enter a building during a military operation on urbanized terrain exercise at Camp Lejeune, N.C., Oct. 3, 2017. The Marines conducted MOUT training in preparation for their upcoming deployment to Japan. (U.S. Marine Corps photo by Lance Cpl. Ashley McLaughlin) - Marines with 2nd Battalion, 8th Marine Regiment enter a building during a military operation on urbanized terrain exercise at Camp Lejeune, N.C., Oct. 3, 2017. The Marines conducted MOUT training in preparation for their upcoming deployment to Japan. (U.S. Marine Corps photo by Lance Cpl. Ashley McLaughlin)

Marines with 2nd Marine Division meet with civilians during the repatriation of 1st Lt. Alexander Bonnyman Jr. in Knoxville, Tenn, Sept. 27, 2015. Bonnyman enlisted in the Marine Corps in 1942 and was awarded the Medal of Honor for his actions during the Battle of Tarawa in 1943. His remains were brought home after being discovered in Tarawa 72 years later. (Courtesy Photo) - Marines with 2nd Marine Division meet with civilians during the repatriation of 1st Lt. Alexander Bonnyman Jr. in Knoxville, Tenn, Sept. 27, 2015. Bonnyman enlisted in the Marine Corps in 1942 and was awarded the Medal of Honor for his actions during the Battle of Tarawa in 1943. His remains were brought home after being discovered in Tarawa 72 years later. (Courtesy Photo)