PM Narendra Modi announced that India would now have a Chief of Defence Staff, a long pending issue. What is the history of the idea, its significance and its implications? Defence minister Rajnath Singh, on August 16, hinted at a revision in India’s no first use nuclear doctrine. What lies behind the move? This week’s edition of Big Picture delves into these twin defence related announcements with the distinguished strategic analyst, C Uday Bhaskar.