Derek Jouppi, a hardware design engineer intern at Facebook Inc., tests servers at the company's hardware labs in Menlo Park, California, U.S., on Monday, April 7, 2014. The largest social network said it is buying Oculus VR Inc., pushing into wearable hardware for the first time and stepping into a race with Google Inc. Irvine, California-based Oculus makes a ski-goggles-like device called Rift,
