Pact (Andean Group) is established. Apollo program: Apollo 10 returns to Earth, after a successful 8-day test of all the components needed for the upcoming first manned Moon landing. May 26–June 2 – John Lennon and Yoko Ono conduct their second Bed-In. The follow-up to the Amsterdam event is held at the Queen Elizabeth Hotel in Montreal, Quebec. Lennon composes and records the song "Give Peace a Chance" during the event. May 29 – Cordobazo: A general strike and civil unrest break out in Córdoba, Argentina. May 30 – Riots in Curaçao mark the start of an Afro-Caribbean civil rights movement on the island. June June 3 – While operating at sea on SEATO maneuvers, the Australian aircraft carrier HMAS Melbourne accidentally rams and slices into the American destroyer USS Frank E. Evans in the South China Sea, killing 74 American seamen. June 5 – An international communist conference begins in Moscow. June 8 – Francisco Franco orders the closing of the Gibraltar–Spain border and communications between Gibraltar and Spain in response to the 1967 Gibraltar sovereignty referendum. The border remains closed until a partial reopening on December 15, 1982. June 8 – U.S. President Richard Nixon and South Vietnamese President Nguyễn Văn Thiệu meet at Midway Island. Nixon announces that 25,000 U.S. troops will be withdrawn by September. June 15 – Georges Pompidou is elected President of France. June 17 – After a 23-game match, Boris Spassky defeats Tigran Petrosian to become the World Chess Champion in Moscow. June 24 – The United Kingdom and Rhodesia sever diplomatic relations, after the Rhodesian constitutional referendum. June 27 – Gay intercourse is officially legalized in Canada. June 28 – The Stonewall riots, a milestone in the modern gay rights movement in the United States, began in New York City. July July 7 – French is made equal to English throughout the Canadian national government. July 8 – Vietnam War: The very first U.S. troop withdrawals are made. July 14 Football War: After Honduras loses an association football match against El Salvador, rioting breaks out in Honduras against Salvadoran migrant workers. Of the 300,000 Salvadoran workers in Honduras, tens of thousands are expelled, prompting a brief Salvadoran invasion of Honduras. The OAS works out a cease-fire on July 18, which takes effect on July 20. The Act of Free Choice for West Irian commences in Merauke, Indonesia. July 16 – Apollo program: