Former Yugoslav president Slobodan Milosevic remains stubborn and petulant in the face of charges of genocide, war crimes and crimes against humanity, former NATO commander Wesley Clark said after testifying to a UN court. I saw no change in his demeanor, no change in his stubborness, no change in his petulance ... it was very familiar," said Clark, who spent many hours negotiating with Milosevic in 1999 before the Western Alliance launched a massive bombing campaign to force the Yugoslav army out of Kosovo. Clark, who is seeking the US Democratic Party nomination to run against President George W. Bush in next year's election, testified Tuesday behind closed doors as part of an unprecedented deal between his government and the International Criminal Tribunal for the former Yugoslavia (ICTY). Under the deal, Washington has two days to apply to have certain passages deleted from a transcript of the hearing if they are deemed to harm the national interests of the United States. The transcript is due to be made public on Friday. Clark is not the first American to take the stand -- William Walker, head of the international commission set up to monitor the ceasefire in Kosovo in 1998-99 has done so -- but Washington has been reluctant to let other US nationals testify. "The trial was extremely well run," Clark told reporters after his second and final day on the witness stand. It "will allow us to move beyond collective guilt towards individual guilt, Clark said, praising the judges as "highly professional" and saying he testified "in excellent conditions". Prosecutors are expected to use Clark's testimony of his meetings with Milosevic during the Kosovo crisis to try to establish that the president controlled Serb troops on the ground and was aware of atrocities they committed against ethnic Albanians. But Clark said Milosevic, who is conducting his own defence, used familiar tactics in cross-examination. "It was a typical Milosevic performance," he said. "He was misplaced in some ways, overly personal. He put on a good face of petulance, obtuseness." Milosevic is being tried on more than 60 charges of war crimes and crimes against humanity for his role in the 1990s wars in Croatia, Bosnia and Kosovo that tore apart the Balkans. He faces a separate genocide charge over the war in Bosnia that left over 200,000 dead. Clark is the latest of around a dozen high level international figures who have taken the stand in the Milosevic trial since it started in February 2001. Paddy Ashdown, former British liberal democrat leader and currently the international community's top representative in Bosnia, told the court in March 2001 that he had warned Milosevic over human right violations in Kosovo and even predicted that he would end up in The Hague. Several months later, Kosovo Albanian leader Ibrahim Rugova accused Milosevic from the witness stand of lying about what happened in Kosovo. Several top officials from the Balkans also came to The Hague: Milosevic's predecessor as Yugoslav President Zoran Lilic, Croatian President Stipe Mesic, former Slovenian president Milan Kucan and former Yugoslav prime-minister Ante Markovic. All four witnesses described how Milosevic played a key role in the wars that raged in the Balkans in the 1990s. Prosecutors have been trying to get Richard Holbrooke, the US diplomat who brokered the 1995 Dayton peace agreement that ended the wars in Bosnia and Croatia, to The Hague but it is unclear if that will happen. **PHOTO CAPTION*** Former Yugoslav president Slobodan Milosevic (pictured) sits inside a courtroom in The Hague. (AFP/POOL/File)