From what I can tell, Cheyenne is NORAD is Peterson AFB. It's all one and the same. NORAD is located inside Cheyenne Mountain with Peterson the topside/official front for the whole operation. NORAD is a joint US/Canadian mission. The SGC is *not* a part of NORAD but does occupy the lower levels of the mountain. So, anyone who works for the SGC, military or civilian, would have a Peterson email addy or a generic USAF email addy. The same holds true for anyone who works for NORAD.

I'd really hate to be in charge of IT for that bunch.