Libya's opposition is facing serious questions after the startling appearance in Tripoli of one of Muammar Gaddafi's sons, Saif al-Islam, his chosen heir.
Only hours earlier, as rebel fighters celebrated their advances in Tripoli, the National Transitional Council in Benghazi reported that Saif al-Islam was in custody.
His defiant gesture shows that the conflict could still full of surprises.
Al Jazeera's Zein Basravi reports.
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