New clashes reported in Tripoli; U.S. citizens evacuating

Heavy gunfire broke out in Libya's capital Wednesday as forces loyal to leader Moammar Gadhafi opened fire in the streets a day after the longtime leader vowed to defend his rule and called on supporters to crack down on antigovernment protesters.

Libyan leader Col. Moammar Gadhafi publicly defied protesters seeking to end his rule, vowing to remain in the country "until the end" as that country closed its ports, suspending oil exports. Margaret Coker and John Bussey discuss.

The fighting in Tripoli came as the opposition reportedly seized control of Misurata, with witnesses saying people were honking their horns and raising pre-Gadhafi flags from the monarchy to celebrate.

Misurata would be the first major city in the west to fall to antigovernment forces, which have mainly been concentrated in the east. Faraj al-Misrati, a local doctor, said six residents had been killed and 200 injured since Jan. 18, when protesters attacked offices and buildings affiliated with Col. Gadhafi's regime.