Although the term, WMD, has become a part of our daily lexicon, it remains very much an abstraction for most of us. This series of images offers a retrospective look at some of these weapons. Most of my subjects are drawn from the Cold War period during which there was a very real threat to the survival of civilization itself. The last sixty years has seen a frenzied tango between strategy and technology that has left us with the chilling array of doomsday machines seen here. Photographed by Martin Miller.