Gunfire, explosions heard in Tripoli

U.S., British and French forces launched attacks on Moammar Gadhafi's forces on Saturdayafter the Libyan leader refused to stop attacking Libyan civilians in the North African country's civil war.By the CNN Wire StaffMarch 20, 2011Updated 0310 GMT (1110 HKT)Tripoli, Libya (CNN) -- Explosions and anti-aircraft fire thundered in the skies above Tripoli early Sunday, but it was not clear whether