181207-M-ZD670-033 CAMP PENDLETON, Calif. (Dec. 7, 2018) Sailors assigned to Naval Mobile Construction Battalion (NMCB) 5 and Soldiers from the Army Corps of Engineers make concrete during 7th Engineer Support Battalion’s 3D Concrete Printing exercise at Camp Pendleton, Calif., Dec. 7, 2018. 7th ESB’s mission was to utilize the Automated Construction of Expeditionary Structures (ACES) Printer to conduct 3D concrete printing and evaluate emerging technology for future application in Marine Corps engineering operations. (U.S. Marine Corps photo by Lance Cpl. Betzabeth Y. Galvan/Released)