Illegal Aliens

I put the coordinates of Area 51 into Google Maps for "Groom Lake Base, Bldg 170" I found the July 2003 space imaging overview and detail images of Area 51 and created an overview and detail overlay for Keyhole 2. I'm also noticing that maps.google.com has certain areas intentionally pixelated or colored over (like the roof of the white house or the capitol building).