Valor award for BM2 Owen Francis Patrick Hammerberg (1920-1945) US Navy. Medal of Honor (posthumously) for actions on 17 February 1945. Owen Hammerberg was the only Navy Diver to earn the Medal of Honor during WW II. His was the only award for heroism at Pearl Harbor beyond the fifteen Medals of Honor awarded for heroism during the initial attack on December 7, 1941. He gallantly gave his life in the service of his country. Visit site. Read full citation.