<thomsona@flash.net> wrote

There's what may be a tallish microwave tower at 37.2283 N,  115.8863
W.

It looks to me like a radar antenna.  The long, skinny reflector with a feed 
horn on an arm is similar to those used by the INS (or whatever they're 
calling it now) and other agencies for tracking airplanes.  In most cases 
the reflector is vertical for better altitude resolution, but with it 
horizontal you get better azimuth resolution, and if you know what the 
altimeter is reading you don't care about altitude resolution.

In other words, it looks like a radar for tracking the aircraft around the 
base.  And it probably rotates, so the direction it's pointing in the 
satellite shot doesn't mean anything.