Syrian Conflict Ignites Sectarian Battles, Tests Hezbollah

Sunni and Shia Muslims are increasingly battling each other throughout the Middle East, as they take sides in the Syrian civil war.

In Lebanon, supporters and opponents of the Syrian regime have taken to open battles in the city of Tripoli.

And Hezbollah, the Islamic militant group that dominates Lebanese politics, is now openly fighting alongside the Syrian regime.

That decision has cost Hezbollah some popular support in Lebanon.