the United States Army and is imprisoned as a traitor. May 3 – WWII: The prison ships Cap Arcona (5,000 dead), Thielbek (2,750 dead) and Deutschland (all survive) are sunk by the British Royal Air Force in Lübeck Bay. Rocket scientist Wernher von Braun and 120 members of his team surrender to U.S. forces (later going on to help start the U.S. space program). German Protestant theologian Gerhard Kittel is arrested by the French forces in Tübingen, Germany. May 4 – WWII: German surrender at Lüneburg Heath: All German armed forces in northwest Germany, Denmark and the Netherlands surrender unconditionally to Field Marshal Bernard Montgomery, effective on May 5 at 08:00 hours British Double (and German) Summer Time. The Netherlands is liberated by British and Canadian troops. Denmark is liberated. Admiral Karl Dönitz orders all U-boats to cease offensive operations and return to bases in Norway. The Holy Crown of Hungary is found in Mattsee, Austria, by the United States Army 86th Infantry Division. The U.S. government keeps the crown in Fort Knox for safekeeping from the Soviets until it is returned to Hungary on January 6 1978. German auxiliary cruiser Orion is sunk on her way to Copenhagen carrying refugees, with a loss of over 3,800 lives. May 5 – WWII: Prague uprising: Prague rises up against occupying Nazi forces, encouraged by radio broadcasts (giving rise to the Battle for Czech Radio). The US 11th Armored Division liberates the prisoners of Mauthausen concentration camp, including Simon Wiesenthal. Canadian soldiers liberate the city of Amsterdam from Nazi occupation. A Japanese fire balloon kills six people, Elsie Mitchell and five children, near Bly, Oregon, when it explodes as they drag it from the woods. These are the only people killed by an enemy attack on the American mainland during WWII. May 6 WWII: Mildred Gillars ("Axis Sally") delivers her last propaganda broadcast to Allied troops (the first was on December 11, 1941). Holocaust: Ebensee concentration camp in Austria is liberated by troops of the 80th Division (United States). May 6–7 – The government of the Independent State of Croatia, the Nazi-affiliated fascist puppet state established in occupied Yugoslavia, flees Zagreb for a location near Klagenfurt in Austria, but is captured in the Bleiburg repatriations that then leads to mass executions. May 7 – WWII: At 02:41, General Alfred Jodl signs the unconditional German Instrument of Surrender in SHAEF HQ at Reims,