Leningrad is renamed St. Petersburg. September 5 – Dissolution of the Soviet Union: The Congress of People's Deputies of the Soviet Union self-dissolves, being replaced by Supreme Soviet of the Soviet Union and State Council of the Soviet Union. September 8 – Dissolution of Yugoslavia: The Republic of Macedonia becomes independent, beginning a name dispute with Greece. September 11 Lebanon Hostage Crisis: Israel releases 51 Arab prisoners and the bodies of nine guerrillas, paving the way for the release of the last western hostages in Lebanon. The Soviet Union announces plans to withdraw military and economic aid to Cuba. September 15 – In the Swedish general election, the Social Democrats suffer their worst election results in 60 years, leading to the resignation of Prime Minister Ingvar Carlsson. September 17 – North Korea, South Korea, Estonia, Latvia, Lithuania, the Marshall Islands, and Micronesia join the UN. September 19 – Ötzi the Iceman is found in the Alps. September 21 – Dissolution of the Soviet Union: Armenia declares independence from the Soviet Union. Nearly a month later on October 27, Turkmenistan declares its independence. Kazakhstan follows suit on December 16. September 21 – 30 – Iraq disarmament crisis: IAEA inspectors discover files on Iraq's hidden nuclear weapons program. Iraqi officials refuse to let them leave with the documents, prompting a standoff that continues until the UN Security Council threatens enforcement actions on Iraq. September 22 – The Huntington Library makes the Dead Sea Scrolls available to the public for the first time. September 24 – Lebanon Hostage Crisis: Lebanese kidnappers release Jackie Mann after more than two years of captivity. September 25 – Salvadoran Civil War: Representatives of the Farabundo Martí National Liberation Front reach an agreement with President of El Salvador Alfredo Cristiani, setting the stage for the end of the war. September 27 – U.S President George H. W. Bush announces unilateral reductions in short-range nuclear weapons and calls off 24-hour alerts for long-range bombers. The Soviet Union responds with similar unilateral reductions on October 5. September 29 – Salvadoran Civil War: An army colonel of the Atlácatl Battalion is found guilty of the 1989 murders of six Jesuits. October October 1 – Dissolution of Yugoslavia: Forces of the Yugoslav People's Army surround Dubrovnik, beginning the Siege of Dubrovnik, which lasts until May 31, 1992. October 3 – Speaker of the U.S. House of Representatives Tom Foley announces the closure