The Marine Corps is eyeing how additive manufacturing can change the ways its construction battalions operate, following a successful proof-of-concept demonstration earlier this year. The service, in partnership with the Pentagon's Defense Innovation Unit and Austin, TX-based startup ICON, in January built a 15-foot-tall, 26-foot-long structure to protect and conceal vehicles at Camp Pendleton in California. The building itself was constructed using ICON's 3D printer and a proprietary cement-based product called "lavacrete." The construction took eight Marines roughly 36 hours...