As airstrikes of the coalition forces continued, a barrage of anti-aircraft gunfire lit up the predawn sky in Tripoli on Wednesday, believed to have been fired by forces loyal to Libyan leader Muammar Gaddafi. Western warplanes have flown more than 300 sorties over Libya and more than 162 Tomahawk cruise missiles have been fired in the United Nations-mandated mission to protect Libyan civilians against government troops.