If a system has the capability of intercepting re-entry vehicles with a greater velocity, it would be disallowed for theater deployment.

CENTERFORSECURITYPOLICY: Multilateral madness

The hack only works until the machine is powered off, but the attack even foils that, intercepting the switch signal and making the system only appear to power down.

ENGADGET: Hang your head, Sequoia e-voting machine; you've been hacked again