Jan. 27, 2013. Millions of Hindu pilgrims are attending the Maha Kumbh festival, which is one of the world's largest religious gatherings that lasts 55 days and falls every 12 years. (AP Photo/Rajesh Kumar Singh, File)

In this Jan. 27, 2013 file photo, a Hindu devotee takes a holy bath at Sangam, the confluence of the Ganges, Yamuna and the mythical Saraswati River, on occasion of Paush Purnima, considered to be very auspicious according to Hindu calendars, during the Maha Kumbh festival in Allahabad, India, Sunday, Jan. 27, 2013. Millions of Hindu pilgrims are attending the Maha Kumbh festival, which is one of the world’s largest religious gatherings that lasts 55 days and falls every 12 years. (AP Photo/Rajesh Kumar Singh, File)