NATO has carried out more air strikes in the Libyan capital, Tripoli, in a bid to subdue forces loyal to Libya's leader Moammar Gadhafi. Witnesses say, they heard explosions and saw smoke rising late Thursday from the city's sea-port. NATO says, its air strikes have significantly degraded pro-government forces in Libya. Meanwhile, Libyan and Tunisian officials denied reports that Mr. Gadhafi's wife and daughter had crossed into Tunisia.