in the United States is repealed for beer of no more than 3.2% alcohol by weight, eight months before the ratification of the Twenty-first Amendment to the United States Constitution. (Now celebrated as National Beer Day in the United States.) 1933 – Nazi Germany issues the Law for the Restoration of the Professional Civil Service banning Jews and political dissidents from civil service posts. 1939 – Benito Mussolini declares an Italian protectorate over Albania and forces King Zog I into exile. 1940 – Booker T. Washington becomes the first African American to be depicted on a United States postage stamp. 1943 – The Holocaust in Ukraine: In Terebovlia, Germans order 1,100 Jews to undress and march through the city to the nearby village of Plebanivka, where they are shot and buried in ditches. 1943 – Ioannis Rallis becomes collaborationist Prime Minister of Greece during the Axis Occupation. 1943 – The National Football League makes helmets mandatory. 1945 – World War II: The Imperial Japanese Navy battleship Yamato, one of the two largest ever constructed, is sunk by United States Navy aircraft during Operation Ten-Go. 1946 – The Soviet Union annexes East Prussia as the Kaliningrad Oblast of the Russian Soviet Federative Socialist Republic. 1948 – The World Health Organization is established by the United Nations. 1954 – United States President Dwight D. Eisenhower gives his "domino theory" speech during a news conference. 1955 – Winston Churchill resigns as Prime Minister of the United Kingdom amid indications of failing health. 1956 – Francoist Spain agrees to surrender its protectorate in Morocco. 1964 – IBM announces the System/360. 1965 – Representatives of the National Congress of American Indians testify before members of the US Senate in Washington, D.C. against the termination of the Colville tribe. 1968 – Two-time Formula One British World Champion Jim Clark dies in an accident during a Formula Two race in Hockenheim. 1969 – The Internet's symbolic birth date: Publication of RFC 1. 1971 – Vietnam War: President Richard Nixon announces his decision to quicken the pace of Vietnamization. 1972 – Vietnam War: Communist forces overrun the South Vietnamese town of Loc Ninh. 1976 – Member of Parliament and suspected spy John Stonehouse resigns from the Labour Party after being arrested for faking his own death. 1977 – German Federal prosecutor Siegfried Buback and his driver are shot by two Red Army Faction members while waiting at a