Fullerton. Barbara Jordan is the first African-American to keynote a political convention. Price Club, as predecessor of Costco, a worldwide membership-registration-only retailer, is founded in California. Family Feud debuts on ABC-TV. July 15 Jimmy Carter is nominated for U.S. president at the Democratic National Convention in New York City. Twenty-six Chowchilla schoolchildren and their bus driver are abducted and buried in a box truck within a quarry in Livermore, California. The captives dig themselves free after 16 hours. The quarry-owner's son and two accomplices are arrested for the crime. July 16–20 – Albert Spaggiari and his gang break into the vault of the Société Generale Bank in Nice, France. July 17 The 1976 Summer Olympics begin in Montreal, Quebec, Canada. East Timor is declared the 27th province of Indonesia. July 18 – 14-year-old Romanian gymnast Nadia Comăneci earns the first of seven perfect scores of 10 at the 1976 Summer Olympics. July 19 – Sagarmatha National Park in Nepal is created. July 20 Viking program: The Viking 1 lander successfully lands on Mars. American criminal Gary Gilmore is arrested for murdering two men in Utah. July 21 – A Provisional Irish Republican Army bomb kills Christopher Ewart-Biggs, new British ambassador to the Irish Republic, and Judith Cooke, a Northern Ireland Office private secretary, in Dublin; two others are seriously wounded but survive. July 26 – In Los Angeles, Ronald Reagan announces his choice of liberal U.S. Senator Richard Schweiker as his vice presidential running mate, in an effort to woo moderate Republican delegates away from President Gerald Ford. July 27 The United Kingdom breaks diplomatic relations with its former colony Uganda in response to the hijacking of Air France Flight 139. Delegates attending an American Legion convention at The Bellevue-Stratford Hotel in Philadelphia, US, begin falling ill with a form of pneumonia: this will eventually be recognised as the first outbreak of Legionnaires' disease and will end in the deaths of 29 attendees. July 28 – The Tangshan earthquake flattens Tangshan, China, killing 242,769 people, and injuring 164,851. July 29 – In New York City, the "Son of Sam" pulls a gun from a paper bag, killing one and seriously wounding another, in the first of a series of attacks that terrorize the city for the next year. July 30 Caitlyn Jenner wins the gold medal in the men's decathlon at the 1976 Summer Olympics in Montreal. In Santiago, Chile,