CARACAS, Venezuela - President Hugo Chavez said Monday that Venezuela should open the coffin of independence hero Simon Bolivar to examine the bones, saying there are sufficient doubts about his death in 1830 to warrant a full investigation. Although history books maintain Bolivar died of tuberculosis, Chavez said doubts exist because some writings suggest it is possible the South American "Liberator" might have been murdered. Chavez has raised this theory before, but went further during a speech on the anniversary of Bolivar's death. "Who knows if they even made Bolivar's bones disappear? We have to determine it now," Chavez said....