The Oculus Rift is a virtual-reality headset that makes wearers feel as if theyre in a video game. It might also help United States military personnel feel like theyre in the Internet. The Pentagons Defense Advanced Research Projects Agency (DARPA) is working on a 3D visualization of online networks called Plan X — the idea is that hacking enemy networks would be easier if the data were arranged spatially, as in a video game — and its now adding Oculus Rift to the project, according to a report by Andy Greenberg of technology site Wired News.