Also - when you're at McCarran airport in Vegas and have the opportunity to look out the windows South to Las Vegas Bvld., take note of the 737's with an orange stripe down the fuselage. Those are the buses for the employees working at Groom, Tonapah, etc. The aircraft were known as the Julie or Juliette flights - perhaps someone can correct me on this as for some reason it doesn't come up with a GIS search - it used to.