A quarter of top positions remain vacant; Congress warns of safety threat
                                
                                
                                    (Newser) -
                                    Nearly 150 top-level management positions at the Department of Homeland Security—nearly a quarter of all available jobs—remain unfilled, a new congressional report warns. The gaps, which include high-level positions at FEMA, immigration agencies, and the Coast Guard, could seriously affect the nation's preparedness for a terrorist threat, according...