Few would dispute that Admiral Hyman G. Rickover cast a large shadow over the late 20th-century U.S. Navy. Not many flag officers in the long and storied history of the service generated as much controversy. Recognized as the father of the Nuclear Navy, some critics contend it was Rickover's influence that caused the shift to a greater emphasis on technical expertise and engineering skills in the Navy, eventually pushing aside the successors to the colorful men of the World War II diesel boats. That transformation can be seen even in popular culture when one observes the change in how submarine skippers have been portrayed on the silver screen. Think of Clark Gable's obsessed Commander "Rich" Richardson in Run Silent, Run Deep and compare him with The Hunt for Red October 's cool Bart Mancuso, captain of the USS Dallas .