People ride motorcycles over a bridge past election billboard advertisements featuring images of Indian Prime Minister Narendra Modi and other party candidates in Patna, Bihar, India, on Monday, July 27, 2015. More than anywhere, Bihar reflects the challenge Prime Minister Narendra Modi faces in overhauling modern India. A vast, landlocked plain bordering the Himalayan nation of Nepal to the north and bisected by the Ganges, India's holiest river, the state is home to about one in 12 Indians. Photographer: Prashanth Vishwanathan/Bloomberg via Getty Images