Now Playing:'Western military strikes unjustified'
Description: Libyan leader Muammar Gaddafi vowed to defend his country against 'colonial aggression' as Western nations launched their first air strikes against Libyan defences and began enforcing a UN-sanctioned no-fly zone over Libya. A French fighter jet launched the first attack Saturday evening, destroying a Libyan military vehicle on the ground as British and French planes began patrolling the skies.