"Danger was all that thrilled him," Dick Byrd's mother once remarked, and from his first pioneering aviation adventures in Greenland in 1925, through his daring flights to the top and bottom of the world and across the Atlantic, Richard E. Byrd dominated the American consciousness during the tumultuous decades between the world wars. He was revered more than Charles Lindbergh, deliberately exploiting the public's hunger for vicarious adventure. Yet...