Earlier, in our lifetimes, we worried a lot. About the Bomb. The thing that has the potential to destroy whole cities, to end civilization itself. Not so much today. Iran pops into the news in a regular cycle, and North Korea, too. But our time now is likely an anomaly, not the norm. This is just a lull in the Cold War. These photos, near abstractions, are pictures of the Bomb in some of its guises.