Deep in the bowels of Facebook's serpentine campus in Menlo Park, California is a room about 25-feet-square that may have a lot to do with how the world thinks about the company in the coming months. It looks like a Wall Street trading floor, with screens on every wall and every desk. And 20 hours a day---soon to be 24 hours a day---it's jammed with about two dozen geeks, spooks, hackers, and lawyers trying to spot and quash the next bad thing to happen on the company's networks.

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