Alexander Wise knows better than most Americans the damage a one-sided account of an important event in the life of this nation can cause. Wise is president of the Tredegar National Civil War Foundation, a non-profit group that has hatched a good idea. Next year, the organization will break ground for a Civil War museum in Richmond, Va., that will tell the story of that bloody conflict from three perspectives: those of the Union, the Confederacy and blacks."There's no place in America that tells the whole story," Wise said. "I don't think you can understand any story unless you look...