 During Westcott 's 35 @-@ year professional career , his assignments included creating photographic documentation of many notable people , including Manhattan Project scientists J. Robert Oppenheimer , Arthur Compton , Glenn Seaborg , Vannevar Bush , Ernest O. Lawrence , and James Bryant Conant , U.S. Army Generals Leslie Groves , Maxwell Taylor and Kenneth Nichols , Admiral Hyman Rickover , Secretary of War Robert P. Patterson , U.S. Senators Estes Kefauver and Kenneth McKellar of Tennessee and Robert A. Taft of Ohio , Tennessee Valley Authority director and AEC chairman David Lilienthal , and seven or eight U.S. Presidents . 
