Tracer bullets are fired in the skies over Tripoli, Libya, as heavy explosions rock the city early Sunday, March 20, 2011. The United States and European nations pounded Col. Moammar Gadhafi's forces and air defenses with cruise missiles and airstrikes Saturday, launching the broadest international military effort since the Iraq war in support of an uprising that had seemed on the verge of defeat. (AP Photo/Jerome Delay)

Photo by: Jerome Delay

Tracer bullets are fired in the skies over Tripoli, Libya, as heavy explosions rock the city early Sunday, March 20, 2011. The United States and European nations pounded Col. Moammar Gadhafi's forces and air defenses with cruise missiles and airstrikes Saturday, launching the broadest international military effort since the Iraq war in support of an uprising that had seemed on the verge of defeat. (AP Photo/Jerome Delay)