Millions of Indians are voting in a six-week long national election in a referendum on Narendra Modi, the populist prime minister who has championed an assertive brand of Hindu nationalist politics. The voters will cast ballots in the first round of voting across 21 states. Over 970 million voters will elect 543 members for the lower house of Parliament for five years during the staggered elections that will run until June 1. The votes will be counted on June 4. (AP Video by Piyush Nagpal)