meets Michael Ramsey, the Archbishop of Canterbury, in Rome, and gives him an episcopal ring. March 26 – Demonstrations are held across the United States against the Vietnam War. March 27 – In South Vietnam, 20,000 Buddhists march in demonstrations against the policies of the military government. March 28 Cevdet Sunay becomes the fifth president of Turkey. Indira Gandhi visits Washington, D.C. March 29 – The 23rd Congress of the Communist Party of the Soviet Union is held: Leonid Brezhnev demands that U.S. troops leave Vietnam, and announces that Chinese-Soviet relations are not satisfactory. March 31 The British Labour Party led by Harold Wilson wins the 1966 United Kingdom general election, gaining a 96-seat majority (compared with a single seat majority when the election was called on February 28). The Soviet Union launches Luna 10, which becomes the first space probe to enter orbit around the Moon. April April 2 – The Indonesian army demands that the country rejoin the United Nations. April 3 – Luna 10 is the first manmade object to enter lunar orbit. April 5 – During the Buddhist Uprising, South Vietnamese military prime minister Nguyễn Cao Kỳ personally attempts to lead the capture of the restive city of Đà Nẵng before backing down. April 7 – The United Kingdom asks the United Nations Security Council for authority to use force to stop oil tankers that violate the embargo against Rhodesia (authority is given April 10). April 8 Buddhists in South Vietnam protest against the fact that the new government has not set a date for free elections. Leonid Brezhnev becomes General Secretary of the Soviet Union, as well as Leader of the Communist Party of the U.S.S.R. April 14 Kenyan Vice President Oginga Odinga resigns, saying "invisible government" representing foreign interests now runs the country. He will head a new party, the Kenya People's Union. The South Vietnamese government promises free elections in 3–5 months. April 15 – An anti-Nasser conspiracy is exposed in Egypt. April 18 China declares that it will stop economic aid to Indonesia. The 38th Academy Awards ceremony is held in Santa Monica, California: The Sound of Music wins Best Picture. April 21 An artificial heart is installed in the chest of Marcel DeRudder in a Houston, Texas, hospital. The opening of the Parliament of the United Kingdom is televised for the first time. Haile Selassie visits Jamaica for the first time,