at Casco Bay, Maine. News of U-234's surrender with her high-ranking German passengers made it a major news event. Reporters swarmed over the Navy Yard and went to sea in a small boat for a look at the submarine. Secret cargo A classified US intelligence summary written on 19 May listed U-234s cargo as including drawings, arms, medical supplies, instruments, lead, mercury, caffeine, steels, optical glass and brass. That the ship carried of uranium oxide remained classified for the duration of the Cold War. Author and historian Joseph M. Scalia claimed to have found a formerly secret cable at Portsmouth Navy Yard which stated that the uranium oxide had been stored in gold-lined cylinders rather than cubes as reported by Hirschfeld; the alleged document is discussed in Scalia's book Hitler's Terror Weapons. The exact characteristics of the uranium remain unknown; Scalia and historians Carl Boyd and Akihiko Yoshida have speculated that rather than being weapons-grade material it was instead intended for use as a catalyst in the production of synthetic methanol for aviation fuel. However, after the war it was learned that the Japanese had cyclotrons and were working on the atomic bomb. The of uranium disappeared. It was most likely transferred to the Manhattan Project's Oak Ridge diffusion plant. The uranium oxide would have yielded approximately of 235U after processing, around 20% of what would have been required to arm a contemporary fission weapon. Disposition As she was not needed by the US Navy, U-234 was sunk off Cape Cod as a torpedo target by on 20 November 1947. In popular culture The Last U-Boat (1992) directed by Frank Beyer Documentary film, Hitler's Last U-Boat Directed by Andreas Gutzeit International Historical Films, Inc. (2001) ASIN B0000646UH See also Japanese-German military technology collaboration References Bibliography Geoffrey Brooks: Hitler's Terror Weapons, Pen & Sword (2002): Webber, Bert, (1985), "Silent Siege-II, Japanese Attacks On North America In WWII. Webber Research Group. Wolfgang Hirschfeld; Geoffrey Brooks, The Story of a U-Boat NCO 1940-1946 Naval Institute Press (1996) Arthur Naujoks, Lee Nelson "The Last Great Secret of the Third Reich", 2002. Council Press. Joseph Mark Scalia, Germany's Last Mission to Japan: The Failed Voyage of U-234 Naval Institute Press (2000) A. V. Sellwood: The Warring Seas, 1955. A biography of the career of U-234 commander Johann Fehler. Richard Dean Starr, Tides of Justice, a short story featuring U-234 in The Avenger Chronicles edited by