LONDON (AFP) - WikiLeaks chief Julian Assange was arrested in London Tuesday on suspicion of rape after surrendering to a Swedish arrest warrant, setting up a possible extradition fight that could drag on for months.Assange, 39, was detained after attending a London police station by appointment at 0930 GMT and is due to appear at City of Westminster Magistrates Court later in the day, the Metropolitan Police said in a statement."Officers from the Metropolitan Police Service's Extradition Unit h