Violence in Libya rages as rebel factions fight Qaddafi loyalists

Days after the mysterious death of Libya’s top rebel leader, opposition fighters staged an eight-hour gunfight with a group Qaddafi loyalists who were posing as another rebel brigade. Tensions within the rebels ranks suggest that there is not unity among the factions. These developments are are latest in a chaotic, confused, and violent situation.   David Kirkpatrick of The New York Times, joins us from the Tunisian/Libyan border, and tells us more about the precarious events on the ground.