A rebel fighter celebrates as his comrades fire a rocket barrage toward the positions of troops loyal to Libyan ruler Muammar Gaddafi April 14, 2011 west of Ajdabiyah, Libya. Rebels exchanged artillery and rocket fire with loyalist troops west of Ajdabiyah April 14 as the confict engulfing Libya continued. (Photo by Chris Hondros/Getty Images)

A youth draped in the flag used by the Libyan rebellion photographs the launch of a rocket toward government loyalist troops April 14, 2011 west of Ajdabiyah, Libya. (Photo by Chris Hondros/Getty Images)

A rebel fighter talks on a cell phone during an exchange of artillery between rebel and government loyalist troops April 14, 2011 west of Ajdabiyah, Libya. (Photo by Chris Hondros/Getty Images)

Rebel fighters load up rockets before launching a barrage toward positions of troops loyal to Libyan ruler Muammar Gaddafi April 14, 2011 west of Ajdabiyah, Libya. (Photo by Chris Hondros/Getty Images)

A youth draped in the flag used by the Libyan rebellion walks April 14, 2011 west of Ajdabiyah, Libya. (Photo by Chris Hondros/Getty Images)

Libyan rebel soldiers return from the front lines April 14, 2011 west of Ajdabiyah, Libya. (Photo by Chris Hondros/Getty Images)

Rebel fighters gas up their vehicles via a fuel truck brought near front line positions April 14, 2011 west of Ajdabiyah, Libya. (Photo by Chris Hondros/Getty Images)

Rebel fighters head out to front line positions April 14, 2011 west of Ajdabiyah, Libya. (Photo by Chris Hondros/Getty Images)

A Syrian girl waits with her family to disembark a ship that evacuated them from the besieged city of Misrata April 15, 2011 in Benghazi, Libya. Nearly 1,200 Asian and African migrants, some with their families, escaped from war-torn Misrata on Friday, evacuated by international aid organizations with a chartered Greek vessel for the relative safety of Benghazi in Libya's rebel-held east. (Photo by Chris Hondros/Getty Images)

Migrant workers from Nigeria and other African countries line up to board a relief ship to leave the besieged city of Misrata April 17, 2011 at the port in Misrata, Libya. Thousands of foreign workers and Libyans alike are trying to leave war-torn Misrata, as fighting continued between Libyan government forces and anti-government rebels. The Libyan government has come under international criticism for using heavy weapons and artillery in its assault on Misrata, which can cause civilian casualties. (Photo by Chris Hondros/Getty Images)

Idle cranes stand together at the port in the besieged city of Misrata April 17, 2011 in Misrata, Libya. (Photo by Chris Hondros/Getty Images)