Case of two young sisters murdered in Maryland had been cold for decades
                                
                                
                                    (Newser) -
                                    More than 40 years after  the disappearance of two young girls  shocked a suburban Maryland community, one of the men believed responsible is set to plead guilty. On Sept. 12,  Lloyd Lee Welch , 60, is expected to enter a guilty plea in a court in rural Bedford County, Virginia, for...