Pariah set to come in from the nuclear cold
                                
                                
                                    (Newser) -
                                    North Korea will close down its main nuclear reactor as early as next month, Reuters reports, citing Russia's Interfax news agency. UN  nuclear inspectors have been invited into the country; now a diplomatic source tell Interfax that inspectors will be present as the Yongbyon reactor, which produces weapons-grade plutonium, begins...