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A two-day hearing that begins today will decide Assange's legal fate. It will also keep the spotlight away from WikiLeaks' revelations and on its opinion-dividing frontman.
Assange is accused of sexual misconduct by two women he met during a visit to Stockholm last year. At Belmarsh Magistrates' Court, a high-security judicial outpost beside a prison, defence lawyers will argue that he should not be extradited because he has not been charged with a crime, because of flaws in Swedish prosecutors' case - and because a ticket to Sweden could land him in Guantanamo Bay or on US death row.
American officials are trying to build a criminal case against WikiLeaks, which has angered Washington by publishing a trove of leaked diplomatic cables and secret US military files. Assange's lawyers claim the Swedish prosecution is linked to the leaks and politically motivated.
Preliminary defence arguments released by Assange's legal team claim "there is a real risk that, if extradited to Sweden, the US will seek his extradition and/or illegal rendition to the USA, where there will be a real risk of him being detained at Guantanamo Bay or elsewhere."
The document adds that "there is a real risk that he could be made subject to the death penalty" if sent to the United States. Under European law, suspects cannot be extradited to jurisdictions where they may face execution.
Many legal experts say the Guantanamo claims are fanciful, and Sweden strongly denies coming under American pressure.
Nils Rekke, head of the legal department at the Swedish prosecutor's office in Stockholm, said Assange would be protected from transfer to the US by strict European rules.
"If Assange was handed over to Sweden in accordance with the European Arrest Warrant, Sweden cannot do as Sweden likes after that," he said. "If there were any questions of an extradition approach from the US, then Sweden would have to get an approval from the United Kingdom."
Assange's lawyers will also battle extradition on the ground that he has not been charged with a crime in Sweden and is only wanted for questioning.
They argue that "it is a well-established principle of extradition law . . . that mere suspicion should not found a request for extradition."
Lawyers for Sweden have yet to disclose their legal arguments.
WikiLeaks sparked an international uproar last year when it published a secret helicopter video showing a US attack that killed two Reuters journalists in Baghdad. It went on to release hundreds of thousands of secret US military files on the wars in Iraq and Afghanistan, and it later began publishing classified US diplomatic cables whose revelations angered and embarrassed the US and its allies.
The furore made Assange, 39, a global celebrity. The nomadic Australian was arrested in London in December after Sweden issued a warrant on rape and molestation accusations.
Released on bail on condition he live - under curfew and electronically tagged - at a supporter's country mansion in eastern England, Assange has managed to conduct multiple media interviews, sign a reported $1.5 million deal for a memoir, and pose for a magazine Christmas photo shoot dressed as Santa Claus.
He drew a large media scrum at a brief court appearance in London last month, where he vowed to step up the leak of a quarter million classified US diplomatic cables.
The full extradition hearing should shed light on the contested events of Assange's trip to Sweden, where WikiLeaks' data are stored on servers at a secure centre tunnelled into a rocky Stockholm hillside. Two Swedish women say they met Assange when he visited the country and separately had sex with him, initially by consent.
In police documents leaked on the Internet, one of the women told officers she woke up as Assange was having sex with her, but let him continue even though she knew he wasn't wearing a condom. Having sex with a sleeping person can be considered rape in Sweden.
Assange is also accused of sexual molestation and unlawful coercion against the second woman. The leaked documents show she accuses him of deliberately damaging a condom during consensual sex, which he denies.
The picture is more confused by the fact that one Stockholm prosecutor threw out the rape case, before a more senior prosecutor later reinstated it and asked for Assange's extradition from Britain so she could question him.
Assange's lawyers argue that amid the confusion, the European arrest warrant was improperly issued. They allege Assange "has been the victim of a pattern of illegal and/or corrupt behaviour by the Swedish prosecuting authorities," who leaked his name to the media, rejected his requests to be interviewed from London, and failed to make the evidence against him available in English.
They also say the accusations against Assange would not constitute a crime in Britain, and complain they have not been given access to text messages and tweets by the two women which allegedly undermine their claims. They say text messages exchanged by the claimants "speak of revenge and of the opportunity to make lots of money."
Whatever happens in court this week, Assange's long legal saga - and his stay in the tranquil Norfolk countryside - is far from over. The extradition hearing is due to end tomorrow but Judge Howard Riddle is likely to take several weeks to consider his ruling - which can be appealed by either side.
Assange, meanwhile, may be tiring of his nomadic life. On Friday he told a meeting in Melbourne by video link that Australian Prime Minister Julia Gillard "should be taking active steps to bring me home."