When police in combat gear arrested two reporters Wednesday in Ferguson, Mo., the journalists' first instinct was to tweet about it. “Ryan, tweet that they’re arresting me, tweet that they’re arresting me," Washington Post's Wesley Lowery told Ryan Reilly of HuffPost. But it was too late: Reilly himself was being put in handcuffs. In an earlier time, Lowery might have phoned his editors to let them know he'd been detained. But this is not then. Back in The Washington Post newsroom, staffers monitoring social media were the first to become concerned about Lowery's whereabouts. Tweets may be little, ephemeral bits of information, but when they wind up launching a major national news story, 140 characters may as well be 140 pages. Within minutes of the reporters' arrest, other journalists were tweeting about the men's disappearance from social media.