In my earlier years I had some dealings with classified material, enough that I was able to see how arbitrary, foolish and transitory security classification can be. That there may be information on somebody’s computer that was classified at some point in the past doesn’t necessarily have any relevance for national security. In summer 1958, I was briefly a consultant for the Rand Corporation in Santa Monica. I had a Q clearance, the most rigorous that the Atomic Energy Commission had. This enabled me to receive classified information on nuclear weapons on a ‘need to know’ basis. During most of my short stay I didn’t need to know anything, but one day the theory division leader descended on me with stacks of numbers he wanted me to add up on a Marchant calculator.