In hurricane, Twitter proves a lifeline despite pranksters

As Hurricane Sandy pounded the U.S. Atlantic coast on Monday night, knocking out electricity and Internet connections, millions of residents turned to Twitter as a part-newswire, part-911 hotline that hummed through the night even as some websites failed and swathes of Manhattan fell dark.

But the social network also became a fertile ground for pranksters who seized the moment to disseminate rumors and Photoshopped images, including a false tweet Monday night that the trading floor at the New York Stock Exchange was submerged under several feet of water.