But on Wednesday afternoon, DARPA put its work on pause and opened up to the press for a precious two hours. The agency that brought you the internet and GPS erected white tents inside the Pentagon courtyard and staged 112 simultaneous demonstrations as journalists rushed around harriedly, trying to suck up as much information as possible before our handlers nudged us out. In one tent, a smiling gentleman in a jaunty hat shook my hand with his prosthetic arm, its soft plastic fingers closing around my palm. DARPA hopes to have it mass produced for soldiers who come back as amputees.