U.S. President Gerald Ford, but is thwarted by a Secret Service agent. The London Hilton Hotel is bombed by the Provisional Irish Republican Army; two people are killed and 63 injured. September 6 – An earthquake of magnitude kills at least 2,085 in Diyarbakır and Lice, Turkey. September 14 – Rembrandt's painting The Night Watch is slashed a dozen times at the Rijksmuseum in Amsterdam. September 15 – The French department of "Corse", comprising the entire island of Corsica, is divided into two departments: Haute-Corse (Upper Corsica) and Corse-du-Sud (Southern Corsica). September 16 Papua New Guinea gains its independence from Australia. Cape Verde, Mozambique and São Tomé and Príncipe join the United Nations. September 19 – General Vasco Gonçalves is ousted as Prime Minister of Portugal. September 20 – The term of Tuanku Al-Mutassimu Billahi Muhibbudin Sultan Abdul Halim Al-Muadzam Shah ibni Almarhum Sultan Badlishah, as the 5th Yang di-Pertuan Agong of Malaysia, ends. September 21 – Sultan Yahya Petra ibni Almarhum Sultan Ibrahim Petra of Kelantan, becomes the 6th Yang di-Pertuan Agong of Malaysia. September 27 – Francoist Spain executes five ETA and FRAP members, the last executions in Spain to date. September 30 – The Hughes Helicopters (later McDonnell-Douglas, now Boeing IDS) AH-64 Apache makes its first flight. October October 1 – Thrilla in Manila: Muhammad Ali defeats Joe Frazier in a boxing match in Manila, Philippines. October 14 The South African Defence Force invades Angola during Operation Savannah in support of the FNLA and UNITA prior to the Angolan elections scheduled for November 11. An RAF Avro Vulcan bomber explodes and crashes over Żabbar, Malta after an aborted landing, killing five crew members and one person on the ground. October 16 The "Balibo Five" Australian television journalists are killed at Balibo by Indonesian Army special forces in the buildup to the Indonesian invasion of East Timor. The last naturally occurring case of smallpox is diagnosed and treated, the victim being two-year-old Rahima Banu. October 30 - Juan Carlos I of Spain becomes acting head of state after General Francisco Franco concedes that he is too ill to govern. His death on November 20 effectively marks the end of the dictatorship established following the Spanish Civil War and the beginning of Spain's transition to democracy. October 31 The Racial Discrimination Act 1975 takes effect in Australia. Tun Mustapha resigned as Chief Minister of Sabah, a state in Malaysia,