It's Not The Ballroom. It's What's Beneath It

[usonian]

5. TOP SECRET. DON'T DIVULGE THE LOCATION

Nothing is bomb-proof.

We lived right nearby "The Blue Cube" in Sunnyvale

Also known as "Silicon Valley’s most likely target in the event of a Soviet nuclear attack." Known to Lockheed employees (with high enough security clearances) as the Sunnyvale Air Force Station, and it kept track of military satellites. In 1983 the Air Force admitted its ability to keep track of the government's military and intelligence satellites was "dependent on the single satellite control facility (SCF) located at Sunnyvale, California."

(Wikipedia)

Clearances? Everyone knew on the sly.

Functions were later transitioned elsewhere.

We had no worries about living in a post-nuclear war scenario.
We'd have been instantly vaporized.

By divulging the details, he guarantees the complete vaporization of Washington D.C. in case of a nuclear attack.
along with his worthless self.