1941 - World War II: Thousands of civilians in Kragujevac in German-occupied Serbia are killed in the Kragujevac massacre.
1944 - The Soviet army and Yugoslav Partisans liberate Belgrade, the capital of Yugoslavia
1944 - Liquid natural gas leaks from storage tanks in Cleveland, then explodes; the explosion and resulting fire level 30 blocks and kill 130.
1944 - General Douglas MacArthur fulfills his promise to return to the Philippines when he commands an Allied assault on the islands, reclaiming them from the Japanese during the Second World War.
1947 - The House Un-American Activities Committee begins its investigation into Communist infiltration of Hollywood, resulting in a blacklist that prevents some from working in the industry for years.
1951 - The "Johnny Bright Incident" occurred in Stillwater, Oklahoma
1952 - Governor Evelyn Baring declared a state of emergency in Kenya and began arresting hundreds of suspected leaders of the Mau Mau Uprising, including Jomo Kenyatta, the future first President of Kenya.
1955 - Publication of The Return of the King, being the last part of The Lord of the Rings.
1967 - A purported bigfoot is filmed by Patterson and Gimlin.
1968 - Former First Lady Jacqueline Kennedy marries Greek shipping tycoon Aristotle Onassis.
1970 - Siad Barre declares Somalia a socialist state.
1973 - The Saturday Night Massacre: President Nixon fires Attorney General Elliot Richardson and Deputy Attorney General William Ruckelshaus after they refuse to fire Watergate prosecutor Archibald Cox, who is finally fired by Robert Bork.
1976 - The ferry George Prince is struck by a ship while crossing the Mississippi River between Destrehan and Luling, LA. Seventy-eight passengers and crew died; only 18 people aboard the ferry survived.
1977 - A plane carrying Lynyrd Skynyrd crashes in Mississippi, killing lead singer Ronnie Van Zant and guitarist Steve Gaines along with backup singer Cassie Gaines, the road manager, pilot, and co-pilot.
1979 - The John F Kennedy library is opened in Boston, Massachusetts.
1982 - During the UEFA Cup match between FC Spartak Moscow and HFC Haarlem, 66 people are crushed to death in the Luzhniki disaster.
1984 - The Monterey Bay Aquarium opens in Monterey Bay, California.
1991 - The Oakland Hills firestorm kills 25 and destroys 3,469 homes and apartments, causing more than $2 billion in damage.
2009 - European astronomers discover 32 new exoplanets.
2011 - Arab Spring and the Libyan civil war: Libyan leader Muammar Gaddafi is killed in Sirte, with National Transitional Council forces taking control of the city, and ending the war.
2011 - Basque separatist militant organisation ETA declares an end to its 43-year campaign of political violence, which has killed over 800 people since 1968.