The United States currently deploys hundreds of nuclear missiles across Colorado, Montana, Nebraska, North Dakota, and Wyoming. Each missile carries a nuclear payload many times more powerful than the Hiroshima bomb, capable of killing hundreds of thousands of people. The Pentagon is now planning to build a new, deadlier generation of these missiles, which are housed in underground silos. But these intercontinental ballistic missiles, or ICBMs, are not meant to be launched, ever. Not even in a nuclear war. Their primary mission is to be destroyed in the ground, along with all the people that...