IT might come one afternoon when youre busy buying pastry at Wengers in Connaught Place, New Delhi. You wouldnt hear any shrill whistle, the advance audio that precedes artillery shells. You wouldnt feel any pain either for being 2,000 ft below an aerially burst 1 megaton thermo-nuclear device80 times more powerful than the Hiroshima onedropped by an F-16 means that you would be vapour in seconds.