September 10 – During the F1 Italian Grand Prix on the circuit of Monza, German Wolfgang von Trips, driving a Ferrari, crashes into a stand, killing 14 spectators and himself. September 12 – The African and Malagasy Union is founded. September 14 The new military government of Turkey sentences 15 members of the previous government to death. The Focolare Movement opens its first North American center in New York. September 17 Military rulers in Turkey hang former prime minister Adnan Menderes, together with the former Minister of Foreign Affairs Fatin Rüştü Zorlu and former Minister of Finance Hasan Polatkan. The world's first retractable roof stadium, the Civic Arena, opens in Pittsburgh, Pennsylvania. September 18 – United Nations Secretary-General Dag Hammarskjöld dies in an air crash, en route to Katanga, Congo. September 21 – In France, the OAS slips an anti-de Gaulle message into TV programming. September 24 The old Deutsche Opernhaus in the Berlin neighborhood of Charlottenburg is returned to its newly rebuilt house, as the Deutsche Oper Berlin. In the U.S., the Walt Disney anthology television series, renamed Walt Disney's Wonderful World of Color, moves from ABC to NBC after seven years on the air, and begins telecasting its programs in color for the first time. Years later, after Disney's death, the still-on-the-air program will be renamed The Wonderful World of Disney. September 28 – A military coup in Damascus, Syria effectively ends the United Arab Republic, the union between Egypt and Syria. September 30 – The Organisation for Economic Co-operation and Development (OECD) is formed to replace the Organisation for European Economic Co-operation (OEEC). October October 1 – Baseball player Roger Maris of the New York Yankees hits his 61st home run in the last game of the season, against the Boston Red Sox, setting a new record for the longer baseball season. The record for the shorter season is still held by Babe Ruth. October 5 – Breakfast at Tiffany's (film) was theatrically released by Paramount Pictures, to critical and commercial success. October 10 – A volcanic eruption on Tristan da Cunha causes the whole population to be evacuated to Britain, where they will remain until 1963. October 12 – The death penalty is abolished in New Zealand. October 17 – Paris massacre of 1961: French police in Paris attack about 30,000 protesting a curfew applied solely to Algerians. The official death toll is 3, but human