reply to post by Groomforce
I think there are several groups providing security. The DOE has their own security for their Sandia facility. ASI is a private security firm that
is/was there. The USAF has their own people, based on the welcome wagon their provided when we parked on Mt Diablo.
ASI sign
Unlike Groom Lake camo dudes, the TTR security will talk to you.
Since the TTR often shuts down on Sundays (freeing the airspace), there may be different security there on the weekend versus during the week.

