World Congregation of Muslims at Bangladesh.

Muslim devotees hold Bangladesh's national flag on an over-crowded train as they return home after a three-day World Congregation of Muslims, or Biswa Ijtema, on the banks of the River Turag just outside Dhaka, Bangladesh, Sunday, Feb. 1, 2009. Some 3 million Muslims joined in a mass prayer ceremony Sunday in Bangladesh, capping an annual three-day event that is one of the world's largest religious gatherings.

At least two million worshippers gathered north of the Bangladeshi capital Dhaka Friday for a three-day event billed as the largest annual Islamic event after the hajj.

Bangladeshi Muslim devotees returning home help a boy to climb the rooftop of a train after the World Congregation of Muslims, or Biswa Ijtema,

Photo Source:AP