Visibly frail and in a wheelchair, Bob Dole reappeared on the U.S. Senate floor Tuesday to support ratification of a treaty advocates say will help disabled people worldwide. Dole served in the Senate from 1969 to 1996, many of those years as the Republican leader. He'd been the Republican's 1996 presidential nominee, the Republicans 1976 vice-presidential nominee and the chairman of the Republican National Committee.
