A nuclear-armed submarine is as dangerous to civilization as an asteroid, and unlike an asteroid it cannot even be located.

I mean, the submarines are what are called second strike capacity. Submarines were described to me this way, they are as dangerous to civilization… And let me say a nuclear-armed, nuclear-powered submarine is as dangerous to civilization as an asteroid. They’re unstoppable. They are unlocatable, the former Chief of the Nuclear Submarine Forces, Admiral Michael Connor, told me it’s easier to find a grapefruit-sized object in space than a submarine under the sea.