NEW DELHI: Everything is going right these days for India, except for one big problem: It is living next to a Pakistan that is coming apart politically, and Indian leaders insist with a tone of resignation that there's nothing they can do about it. Starting with Prime Minister Manmohan Singh, top Indian officials know that their booming democracy is endangered by the growing chaos across the border in Pakistan. ---------- Welcome to the world's most dangerous zero-sum game. The sad fact is that India and Pakistan, separated at birth in 1947, are locked in what seems like a blood feud....