For a real sleep-killer - but very interesting! - read a nonfiction title; Command and Control; nuclear weapons, the Damascus accident, and the illusion of safety  by Eric Schlosser.  A little town VERY near where I grew up was the site for a Titan II missile that nearly detonated, WITH its nuclear warhead, because a trainee dropped a wrench. And that's far from the only incident. Of course, most of them happened in the seventies and eighties, not so much nowadays, but how much of this stuff is still around? As one of the generals said, "You can't eliminate human error, and you can't plan for it."