Had a bro who went through this.
Showed up at work...no signs, agent, airplanes, nuffin,...everything not physically bolted to the airport structure was gone. Cycled through most of the company phone numbers...all disconnected.
Finally calls the owners home: "Yea we shut down last night. Guess someone should have called you".
My guess is this kind of story goes back to 1903.
Richman