If you live in any major city in the world, that city's precise co-ordinates will be in the firing code for a nuclear missile sitting in a bunker...somewhere in the USA or in Russia. That is the world we have all lived in for several decades. The world of MAD, or Mutually Assured Destruction. Over the past 50 years, the number of nuclear powers has...remarkably... been restricted to just about ten. But now the dam is breaking, and every year more states, many of them unstable, reach out towards the Bomb. It is that threat that has brought nuclear disarmament centre stage once again. This is the only programme ever made on dismantling nuclear weapons where we were allowed to film inside secret installations in both America and Russia.This programme is ultimately... about the fate of your city.