I was privileged to see the Additive Manufacturing facilities at the Army's Aberdeen Proving Ground two years ago when it sponsored a tour for 3D Maryland Professional Members including RapidMade. We all had to get security clearances just to enter the campus - our cars were inspected and all cell phones were stowed. It was well worth the hour-long slog up and back on the dreaded I95/I695 commute.
Their US Army Research Laboratory housed every available 3D printing technology including DMLS, SLS, FDM and ColorJet. There were entire rooms dedicated to complex engineering projects driven by cutting-edge technologies that I couldn't begin to describe. One initiative that is a priority - and no secret - is work on head gear that protects against head injuries.
Yesterday, high-level Department of Defense officials toured the site to personally witness the laboratory's achievements. I'm sure they drove away onto I95 as impressed as I was.