11–28 – The UNMIH is prevented from entering Haiti by its military-led regime. On October 18, United Nations economic sanctions (abolished in August) are reinstated. U.S. President Bill Clinton sends 6 American warships to enforce them. October 13 1993 Greek legislative election: Andreas Papandreou begins his second term as Prime Minister of Greece. The fifth summit of the Francophonie opens in Mauritius. The 1993 Finisterre earthquakes in Papua New Guinea kill at least 60 due to landslides. October 19 – Benazir Bhutto becomes the Prime Minister of Pakistan for the second time. October 21 – A coup in Burundi results in the death of president Melchior Ndadaye and sparks the Burundi Civil War. October 25 – 1993 Canadian federal election: Jean Chrétien and his Liberal Party defeat the governing Progressive Conservative Party, which falls to a historic low of two seats. November November 1 – The Maastricht Treaty takes effect, formally establishing the European Union. November 4 – Jean Chrétien becomes the 20th Prime Minister of Canada. November 5 – The Parliament of the United Kingdom passes the Railways Act 1993, setting out the procedures for privatisation of British Rail. November 9 – Bosnian Croat forces destroy the Stari Most, or Old Bridge of Mostar, Bosnia and Herzegovina, by tank fire. November 12 – London Convention: Marine dumping of radioactive waste is outlawed. November 14 – In a status referendum, residents of Puerto Rico vote by a slim margin to maintain Commonwealth status. November 17–22 – The North American Free Trade Agreement (NAFTA) passes the legislative houses in the United States, Canada and Mexico. November 17 In Nigeria, General Sani Abacha ousts the government of Ernest Shonekan in a military coup. The first meeting of the Asia-Pacific Economic Cooperation summit opens in Seattle. November 20 – An Avioimpex Yakovlev Yak-42D crashes into Mount Trojani near Ohrid, Macedonia. All 8 crew members and 115 of the 116 passengers are killed. November 28 – The Observer reveals that a channel of communications has existed between the Provisional Irish Republican Army and the British government, despite the government's persistent denials. November 30 An agreement establishing the Permanent Tripartite Commission for East African Co-operation is signed. U.S. President Bill Clinton signs the Brady Handgun Violence Prevention Act. December December 2 STS-61: NASA launches the Space Shuttle Endeavour on a mission to repair an optical flaw in the Hubble Space Telescope. Colombian drug lord Pablo