countries to recognize Ukraine's independence. The history of Ukraine between 1991 and 2004 was marked by the presidencies of Leonid Kravchuk and Leonid Kuchma. This was a time of transition for Ukraine. While it had attained nominal independence from Russia, its presidents maintained close ties with their neighbours. On June 1, 1996, Ukraine became a non-nuclear nation, sending the last of the 1,900 strategic nuclear warheads it had inherited from the Soviet Union to Russia for dismantling. Ukraine had committed to this by signing the Budapest Memorandum on Security Assurances in January 1994. The country adopted its constitution on June 28, 1996. The Cassette Scandal of 2000 was one of the turning points in the post-independence history of the country. Orange Revolution (2004) In 2004, Leonid Kuchma announced that he would not run for re-election. Two major candidates emerged in the 2004 presidential election. Viktor Yanukovych, the incumbent Prime Minister, supported by both Kuchma and by the Russian Federation, wanted closer ties with Russia. The main opposition candidate, Viktor Yushchenko, called for Ukraine to turn its attention westward and eventually join the EU. In the runoff election, Yanukovych officially won by a narrow margin, but Yushchenko and his supporters cried foul, alleging that vote rigging and intimidation cost him many votes, especially in eastern Ukraine. A political crisis erupted after the opposition started massive street protests in Kyiv and other cities, and the Supreme Court of Ukraine ordered the election results null and void. A second runoff found Viktor Yushchenko the winner. Five days later, Viktor Yanukovych resigned from office and his cabinet was dismissed on January 5, 2005. Yushchenko rule In March 2006, the Verkhovna Rada elections took place and three months later the official government was formed by the "Anti-Crisis Coalition" among the Party of Regions, Communist, and Socialist parties. The latter party switched from the "Orange Coalition" with Our Ukraine, and the Yulia Tymoshenko Bloc. The new coalition nominated Viktor Yanukovych for the post of Prime Minister. Yanukovych once again became Prime Minister, while the leader of the Socialist Party, Oleksander Moroz, managed to secure the position of chairman of parliament, which is believed by many to have been the reason for his leaving the Orange Coalition, where he had not been considered for this position. On April 2, 2007, President Yushchenko dissolved the Verkhovna Rada because members of his party were defecting to the opposition. His