Nearly a month after news broke of a massive breach at the Office of Personnel Management -- and three weeks after first denying, then admitting, that security clearance information was stolen -- OPM has shut down its electronic background check system. The agency said the move is a proactive step, not a reaction to another hack. In a June 29 alert posted on OPM's website, the agency says, "The [Electronic Questionnaires for Investigations Processing] e-QIP system will be down for an extended period of time for security enhancements." There was no word on how background checks would be handled with...