the UEFA Euro 1992 football tournament, which is won by Denmark. June 16 – A "Joint Understanding" agreement on arms reduction is signed by U.S. President George H. W. Bush and Russian President Boris Yeltsin (this is later codified in START II). June 17 Two German relief workers held since 1989, Thomas Kemptner and Heinrich Struebig, are handed over to the German authorities after their release; they are the last Western hostages in Lebanon. Violence breaks out between the African National Congress and the Inkatha Freedom Party in Boipatong, South Africa, leaving 46 dead. June 18 – Ireland votes for the Eleventh Amendment of the Constitution of Ireland to accept the Maastricht Treaty with a popular vote of over 69%. June 20 Estonia adopts the kroon as currency, becoming the first former Soviet Republic to replace the Soviet rouble. In Paraguay the National Constituent Assembly approves the new Constitution of Paraguay. June 21 – Nelson Mandela announces that the African National Congress will halt negotiations with the government of South Africa following the Boipatong massacre of June 17. June 23 – The Israeli legislative election is won by the Israeli Labor Party under the leadership of Yitzhak Rabin, ousting a Likud government. June 25 – The Black Sea Economic Cooperation (BSEC) is founded. June 26 – Denmark beats Germany 2–0 in the final to win the 1992 UEFA European Football Championship at Ullevi Stadium in Gothenburg, Sweden. June 28 – Estonia holds a referendum on its constitution, which will come into effect on July 3. July July 6–8 – The 18th G7 summit is held in Munich. July 6–29 – Iraq disarmament crisis: Iraq refuses a U.N. inspection team access to the Iraqi Ministry of Agriculture. UNSCOM claims that it has reliable information that the site contains archives related to illegal weapons activities. U.N. inspectors stage a 17-day "sit-in" outside of the building, but leave when their safety is threatened by Iraqi soldiers. July 10 In Miami, former Panamanian dictator Manuel Noriega is sentenced to 40 years in prison for participating in the illegal drug trade and racketeering. The Giotto spacecraft flies past Comet 26P/Grigg–Skjellerup, gathering measurements about the comet. July 13 – Yitzhak Rabin becomes prime minister of Israel. July 16 – At the 1992 Democratic National Convention, Arkansas Governor Bill Clinton accepts his party's presidential nomination on behalf of the "forgotten middle class". July 17 – The Slovak