Once-every-144-years festival transforms Indian city

PRAYAGRAJ, India -- As the sun rises over the ancient city of Prayagraj, the streets begin to fill with the energy of a spiritual journey unlike any other. Over 45 days from mid-January, officials in this city in the northern state of Uttar Pradesh expect to welcome about 400 million Hindu pilgrims arriving for the world's largest religious event -- which has not been held in this form for 144 years.