Why’s he coming at Diwali? He wouldn’t host an official visit the White House on Christmas Day. So why’s he coming to India during our biggest festival? So say many residents of Mumbai, where US president Barack Obama arrives late on Friday for a three-day trip to India. The privileged few who will meet the great man might be excited by the prospect. But for many Mumbaikers, Obama will get in the way of what they like best - a good party. Fireworks, a highlight of any Diwali - after all, it is the festival of lights - will be...