This is CBC News Good evening, I'm Marcia Young. This is The World This Weekend. Tonight, Tragedy at sea. An Italian cruise liner with 4000 people on board runs aground, dozens are still unaccounted for. Also tonight, A year on, the country where the Arab Spring began. Tunisians celebrate their first year without a dictator. And later Rebuilding a party. The federal Liberals draw thousands of members to its convention in Ottawa as it chooses a new path forward. That's later in the program