massacre 560 people in Sant'Anna di Stazzema. 1944 – Nazi German troops end the week-long Wola massacre, during which time at least 40,000 people are killed indiscriminately or in mass executions. 1944 – Alençon is liberated by General Philippe Leclerc de Hauteclocque, the first city in France to be liberated from the Nazis by French forces. 1948 – Babrra massacre: About 600 unarmed members of the Khudai Khidmatgar movement are shot dead on the orders of the Chief Minister of the North-West Frontier Province, Abdul Qayyum Khan Kashmiri, on Babrra ground in the Hashtnagar region of Charsadda District, North-West Frontier Province (now Khyber Pakhtunkhwa), Pakistan. 1950 – Korean War: Bloody Gulch massacre: 75 American POWs are massacred by the North Korean Army. 1952 – The Night of the Murdered Poets: Thirteen prominent Jewish intellectuals are murdered in Moscow, Russia, Soviet Union. 1953 – First thermonuclear bomb test: The Soviet atomic bomb project continues with the detonation of "RDS-6s" (Joe 4) using a "layered" scheme. 1953 – The 7.2 Ionian earthquake shakes the southern Ionian Islands with a maximum Mercalli intensity of X (Extreme). Between 445 and 800 people are killed. 1960 – Echo 1A, NASA's first successful communications satellite, is launched. 1964 – South Africa is banned from the Olympic Games due to the country's racist policies. 1969 – Violence erupts after the Apprentice Boys of Derry march in Derry, Northern Ireland, resulting in a three-day communal riot known as the Battle of the Bogside. 1976 – Between 1,000 and 3,500 Palestinians are killed in the Tel al-Zaatar massacre, one of the bloodiest events of the Lebanese Civil War. 1977 – The first free flight of the . 1977 – The Sri Lanka Riots: Targeting the minority Sri Lankan Tamils, begin, less than a month after the United National Party came to power. Over 300 Tamils are killed. 1981 – The IBM Personal Computer is released. 1985 – Japan Airlines Flight 123 crashes into Osutaka ridge in Gunma Prefecture, Japan, killing 520, to become the worst single-plane air disaster. 1990 – Sue, the largest and most complete Tyrannosaurus rex skeleton found to date, is discovered by Sue Hendrickson in South Dakota. 1992 – Canada, Mexico and the United States announce completion of negotiations for the North American Free Trade Agreement (NAFTA). 1994 – Major League Baseball players go on strike, eventually forcing the cancellation of the 1994 World Series. 2000