three-day Islamic Congregation on the banks of the River Turag in Tongi, on the outskirts of Dhaka, Bangladesh

A Bangladeshi Muslim prays as thousands of Bangladeshi Muslims on overcrowded trains try to return home after attending the three-day Islamic Congregation on the banks of the River Turag in Tongi, on the outskirts of Dhaka, Bangladesh, Sunday, Jan. 23, 2011. The congregation, held each year since 1966, is among the world's largest religious gatherings.

A vendor, center, foreground, and a man jump from the top of one overcrowded train to another as thousands of Bangladeshi Muslims try to return home after attending the three-day Islamic Congregation on the banks of the River Turag in Tongi, outskirts of Dhaka, Bangladesh, Sunday, Jan. 23, 2011. The congregation, held each year since 1966, is among the world's largest religious gatherings

Thousands of Bangladeshi Muslims board overcrowded trains as they try to return home after attending the three-day Islamic Congregation on the banks of the River Turag in Tongi, outskirts of Dhaka, Bangladesh, Sunday, Jan. 23, 2011. The congregation, held each year since 1966, is among the world's largest religious gatherings

Thousands of Bangladeshi Muslims try to return home after attending the three day Islamic Congregation on the banks of the river Turag in Tongi, outskirts of Dhaka, Bangladesh, Sunday, Jan. 23, 2011. The congregation held each year since 1966, is among the world's largest religious gatherings

Thousands of Bangladeshi Muslims board overcrowded trains as they try to return home after attending the three-day Islamic Congregation on the banks of the river Turag in Tongi, outskirts of Dhaka, Bangladesh, Sunday, Jan. 23, 2011. The congregation held each year since 1966, is among the world's largest religious gatherings