Known about them forever.

Interesting thing to so is navigate to "flightradar24.com" scroll over to Las Vegas Harry Reid Airport.Do this around 0400 hrs to 0600 hrs and from 1600 hrs to 1800 hrs.

You can track the aircraft with the flight identification starting with WWW. Almost all 737-600s painted white with a red stripe. Once was a Beechcraft. All the 737s bought from China. You can see them take off from the airport and then drop off radar over Area 51 and over Tonopah, aka Area 52.

JANET stands for Just Another Nonexistent Terminal.

Spy on the spies.