Mississippi. 1942 – World War II: Adolf Hitler issues Fuhrer Directive No. 41 summarizing Case Blue, including the German Sixth Army's planned assault on Stalingrad. 1942 – World War II: The Imperial Japanese Navy launches a carrier-based air attack on Colombo, Ceylon during the Indian Ocean raid. Port and civilian facilities are damaged and the Royal Navy cruisers and are sunk southwest of the island. 1943 – World War II: United States Army Air Forces bomber aircraft accidentally cause more than 900 civilian deaths, including 209 children, and 1,300 wounded among the civilian population of the Belgian town of Mortsel. Their target was the Erla factory one kilometer from the residential area hit. 1945 – Cold War: Yugoslav leader Josip Broz Tito signs an agreement with the Soviet Union to allow "temporary entry of Soviet troops into Yugoslav territory". 1946 – Soviet troops end their year-long occupation of the Danish island of Bornholm. 1946 – A Fleet Air Arm Vickers Wellington crashes into a residential area in Rabat, Malta during a training exercise, killing all 4 crew members and 16 civilians on the ground. 1949 – A fire in a hospital in Effingham, Illinois, kills 77 people and leads to nationwide fire code improvements in the United States. 1951 – Cold War: Ethel and Julius Rosenberg are sentenced to death for spying for the Soviet Union. 1956 – Cuban Revolution: Fidel Castro declares himself at war with Cuban President Fulgencio Batista. 1958 – Ripple Rock, an underwater threat to navigation in the Seymour Narrows in Canada is destroyed in one of the largest non-nuclear controlled explosions of the time. 1966 – During the Buddhist Uprising, South Vietnamese Prime Minister Nguyễn Cao Kỳ personally attempted to lead the capture of the restive city of Đà Nẵng before backing down. 1969 – Vietnam War: Massive antiwar demonstrations occur in many U.S. cities. 1971 – In Sri Lanka, Janatha Vimukthi Peramuna launches a revolt against the United Front government of Sirimavo Bandaranaike. 1976 – In China, the April Fifth Movement leads to the Tiananmen Incident. 1977 – The US Supreme Court rules that congressional legislation that diminished the size of the Sioux people's reservation thereby destroyed the tribe's jurisdictional authority over the area in Rosebud Sioux Tribe v. Kneip. 1991 – An ASA EMB 120 crashes in Brunswick, Georgia, killing all 23 aboard including Sen. John Tower and astronaut Sonny Carter. 1992 –