Gaddafi's son makes defiant stand

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.