And the centrifuges, the US government’s experts knew from their own bitter experience, were highly sensitive. Because they spun at supersonic speeds, any dramatic change—triggered, say, by a change in current—could send the rotors out of kilter, like a child’s wobbling top. When they became unstable, the centrifuges would blow up, taking out any machinery or people nearby. Uranium gas would be spilled all over the centrifuge hall. In short, to stop the Bomb, America’s new cyber army had made a bomb—a digital one.
