Iraqi Shiites mark ritual at Baghdad shrine

Tens of thousands of Shiite Muslims pilgrims thronged a shrine in Baghdad on Wednesday for a ritual mourning ceremony amid a surge in violence that has sparked fears of a new all-out sectarian war. Security forces effectively shut down much of Baghdad, closing off major roads and limiting what cars could be on the streets, to protect against attacks after nationwide violence rose last month to its highest level since 2008. Duration: 00:51