Libyan rebels are battling troops loyal to Colonel Muammar Gaddafi for control of Tripoli, after they launched an assault on the capital from several directions. Rebel commanders say they have taken control of about 80 percent of the capital, including the headquarters of state TV. But fighting is still raging in parts of the city, and the rebels have not managed to find the Libyan leader. Reporter Marine Olivesi is in Tripoli.