KOLKATA, INDIA - OCTOBER 11: Hindu devotees gathered in numbers on the banks of river for the immersion of goddess Durga, as part of the Durga Puja festival, on October 11, 2016 in Kolkata, India. The Durga Puja festival commemorates the slaying of demon king Mahishasur by goddess Durga, marking the triumph of good over evil. (Photo by Subhankar Chakraborty /Hindustan Times )