The single biggest customer for supercomputers is the Department of Energy which uses them for simulating nuclear weapons. That's how our nuclear arsenal is mai

The single biggest customer for supercomputers is the Department of Energy which uses them for simulating nuclear weapons. That's how our nuclear arsenal is maintained. Having access to that computing power would make it easier for main MAD foe to maintain their arsenal, among simulating tons of other things for aerospace and defense. There's just no good reason to let them have that capability.