Capital Coverage -- Robert Abernethy is the NBC News correspondent in the U.S. Senate. His other assignments have ranged from coverage of West Germany to producing a TV "Report from Outer Space." He scored a beat on the 1956 Anglo-French invasion of Egypt, spent three years with the NBC News bureau in London, was first to break the story of the selection of the U.S. astronauts, covered Lyndon B. Johnson throughout his campaign for the Vice Presidency, and traveled with him during his recent tour of the Far East.