September 20 – Hezbollah car-bombs the U.S. Embassy annex in Beirut, killing 24 people. September 26 – The United Kingdom and the People's Republic of China sign the initial agreement to return Hong Kong to China in 1997. October October 4 – Tim Macartney-Snape and Greg Mortimer become the first Australians to reach the summit of Mount Everest. October 5 – STS-41-G: Marc Garneau becomes the first Canadian in space, aboard the Space Shuttle Challenger. October 9 - Thomas the Tank Engine & Friends by Britt Allcroft broadcasts its first 2 episodes in the United Kingdom. October 11 Aboard the Space Shuttle Challenger, astronaut Kathryn D. Sullivan becomes the first American woman to perform a space walk. Aeroflot Flight 3352 crashed at Omsk Airport into maintenance vehicles on the runway, killing 174 people on board and 4 on the ground. October 12 – The Provisional Irish Republican Army (PIRA) attempts to assassinate Prime Minister Margaret Thatcher and the British Cabinet in the Brighton hotel bombing. The terror attack kills five people and injures 31. October 14 – The Detroit Tigers defeat the San Diego Padres in game five of the 1984 World Series to win the franchise's 4th championship. October 19 – Polish secret police kidnap Jerzy Popiełuszko, a Catholic priest who supports the Solidarity movement. His body is found in a reservoir 11 days later on October 30. October 20 – Monterey Bay Aquarium is opened to the public after seven years of development and construction. October 23 – The world learns from moving BBC News television reports presented by Michael Buerk of the famine in Ethiopia, where thousands of people have already died of starvation due to a famine, and as many as 10,000,000 more lives are at risk. October 25 – The European Economic Community makes £1.8 million available to help combat the famine in Ethiopia. October 31 – Assassination of Indira Gandhi: Prime Minister of India Indira Gandhi is assassinated by her two Sikh security guards in New Delhi. Anti-Sikh riots break out, leaving 10,000 to 20,000 Sikhs dead in Delhi and surrounding areas with majority populations of Hindus. Rajiv Gandhi becomes Prime Minister of India. November November 1–4 – Anti Sikh Mass murder took place in Delhi and various parts of India following the assassination of Prime Minister Indira Gandhi November 4 – The Sandinista Front wins the Nicaraguan general elections. November 6 – 1984