tripoli. four decades of gadhafi s rule are now close to coming to an end. the result of a rapid advance by rebel forces over the weekend and the culmination of months of fighting in cities and towns across the libyan coast. nbc news can confirm that two of gadhafi s sons are in custody, saif and mohammed. and al jazeera reporting a third has been captured. we re working on that confirmation. but sources close to gadhafi s inner circle say that saif did try to flee dressed as a woman. meanwhile, the search for gadhafi continues after south african officials denied that they were trying to help the colonel flee to that country. nbc chief foreign correspondent richard engel is inside tripoli with the very latest for us. richard, good morning. reporter: the celebrations are ongoing here in tripoli. this city is still in the process of falling to the hands of the rebels. they now control about 80% of tripoli. but there are still some pockets of this city where fighting is