States, with Hal March as the host. June 11 – Le Mans disaster: Eighty-three people are killed and at least 100 are injured, after two race cars collide in the 1955 24 Hours of Le Mans. June 13 – Mir Mine, the first diamond mine in the Soviet Union, is discovered. June 16 – Lady and the Tramp, the Walt Disney company's 15th animated film, premieres in Chicago. June 26 – The Freedom Charter of the anti-apartheid South African Congress Alliance is adopted, at a Congress of the People in Kliptown. July July 1 – Transformation from the Imperial Bank of India to the State Bank of India is given legal recognition through an Act of the Parliament of India. July 7 – The New Zealand Special Air Service is formed. July 13 – Ruth Ellis is hanged for murder in London, becoming the last woman ever to be executed in the United Kingdom. July 17 The Disneyland theme park opens in Anaheim, California, an event broadcast on the American Broadcasting Company television network. The first atomic-generated electrical power is sold commercially, partially powering Arco, Idaho, from the U.S. National Reactor Testing Station; on July 18, Schenectady, New York, receives power from a prototype nuclear submarine reactor at Knolls Atomic Power Laboratory. July 18 – Illinois Governor William Stratton signs the Loyalty Oath Act, that mandates all public employees take a loyalty oath to the State of Illinois and the United States or lose their jobs. July 18–23 – Geneva Summit between the United States, Soviet Union, United Kingdom and France. July 22 – In Long Beach, California (United States), Hillevi Rombin of Sweden is crowned Miss Universe. July 27 – El Al Flight 402 from Vienna (Austria) to Tel Aviv, via Istanbul, is shot down over Bulgaria. All 58 passengers and crewmen aboard the Lockheed Constellation are killed. July 28 – The first Interlingua Congress is held in Tours, France, leading to the foundation of the Union Mundial pro Interlingua. August August 1 – The prototype Lockheed U-2 reconnaissance aircraft first flies, in Nevada. August 18 The First Sudanese Civil War begins. The first meeting of the Organization of Central American States (, ODECA) is held, in Antigua Guatemala. August 19 – Hurricane Diane hits the northeastern United States, killing over 200 people and causing over $1 billion in damage. August 20 – Hundreds of people are killed in