A federal judge has cleared the way for a civil lawsuit to go to trial accusing an Alabama coal company's Colombian arm of complicity in the killings of three union leaders in the South American country in 2001. Drummond Ltd. and its president, Augusto Jimenez, must answer wrongful death claims made in the lawsuit filed five years ago by the Colombian union Sintramienergetica...Bowdre dismissed other claims, including all accusations of wrongdoing against the privately held Drummond Co. Inc., which is based in Birmingham and is the parent company of Drummond Ltd...Drummond has denied any involvement in the killings...