Facebook's first blind engineer is revolutionizing social media as we know it

Halfway through Matt King's presentation, the screen goes dark. It's the kind of glitch that might make a man sweat in front of the audience. But this is no glitch. King has done it deliberately to bring us into his world, however disorienting it might be for the rest of the room. "I'm going to put it into a state that's more like how I operate," King says with just a hint of mischief.