In his retirement, I was once talking to the late R.N. Kao, founder-director of the Research and Analysis Wing (RAW), India's espionage agency. “I want to tell you everything,” he said, in response to one of my questions. “But I have been used to keeping secrets all my life. And now, even as I try to tell you something, I feel as if I am on the point of denuding myself.” Obviously, there wasn’t much to ask after that, even less to say by way of answer.