Wait, wait, wait. I think I'm behind. Why would the National Security Admin (right?) have shut down VNS? Even though I like the idea.
The only thing other than sunspots that could shut down every VNS satellite uplink is the National Security Agency (NSA). It would only do so under orders of the president, but because presidents like to have deniability in situations like this, my suspicion is that Cheney made the call. Thus we avoided a repeat of 2000 in 2002.