Chinese Communist forces move into Lhasa, the capital of Tibet. September 10 – The United Kingdom begins an economic boycott of Iran. September 18 – The following films are released in the United States: 20th Century Fox's Robert Wise science fiction film The Day the Earth Stood Still. Elia Kazan's adaptation of the Tennessee Williams play A Streetcar Named Desire, becoming a critical and box-office smash. September 20 – NATO accepts Greece and Turkey as members. September 24 – MGM releases the musical Show Boat. September 26–28 – A blue sun is seen over Europe: the effect is due to ash coming from the Canadian forest fires 4 months previously. September 30 – Charlotte Whitton becomes mayor of Ottawa and Canada's first woman mayor of a major city. October October 3 – "Shot Heard 'Round the World (baseball)": One of the greatest moments in Major League Baseball history occurs when the New York Giants' Bobby Thomson hits a game-winning home run in the bottom of the 9th inning off of Brooklyn Dodgers pitcher Ralph Branca, to win the National League pennant after being down 14 games. October 3–8 – Korean War: First Battle of Maryang-san – United Nations (primarily Australian) forces drive back the Chinese. October 4 MGM's Technicolor musical film An American in Paris, starring Gene Kelly and Leslie Caron, and directed by Vincente Minnelli, premieres in New York. It will go on to win 6 Academy Awards, including Best Picture. Shoppers World, one of the first shopping malls in the United States, opens in Framingham, Massachusetts. October 6 – Malayan Emergency: Communist insurgents kill British commander Sir Henry Gurney. October 14 – The Organization of Central American States (Organización de Estados Centroamericanos, ODECA) is formed. October 15 Norethisterone, the progestin used in the combined oral contraceptive pill, is synthesized by Luis E. Miramontes in Mexico. I Love Lucy makes its debut on CBS television in the United States. October 16 Judy Garland begins a series of concerts in New York's Palace Theatre. Prime Minister Liaquat Ali Khan of Pakistan is assassinated. East China Normal University is founded in Shanghai, China. October 17 – CBS's Eye logo premieres on American television. October 19 – The state of war between the United States and Germany is officially ended. October 20 – The Johnny Bright incident occurs in Stillwater, Oklahoma. October 21 – A storm in southern Italy kills over 100.