Gunfire erupted on the streets of Beirut on Thursday, killing six people. The violence erupted when armed supporters of Shiite militant and political groups, Hezbollah and Amal, marched through a Christian neighborhood in protests against the judge presiding over the August blast investigation. And police say a bow-and-arrow attack in Norway Wednesday night in which a man is suspected of killing five people appears to be an "act of terror.” It’s the worst attack in Norway since Anders Breivik, the far-right extremist who killed 77 people in 2011. Plus, The World remembers Irish musician Paddy Moloney, master of the uilleann pipes, slide whistle and penny whistle, and co-founder of the Chieftains.