707guy
"You can't make this shit up..."
Beat me to it. I took the tour of an E-4, they are stationed at Offutt. It is an interesting aircraft, but definitely a relic of the Cold War. The flight deck is straight out of 1975, the rest of the plane is very nicely appointed (plush, padded blue carpet). They are stretched very thin with only four aircraft and one pretty much always pulling presidential support and one on alert at Offutt. They actually have a VLF antenna like the E-6, but from what I understand don't use it too much. It is pretty interesting watching a 747 do T&Gs at Offutt.
When I was at Pax in the early 90's I was looking at where I might go next. There was actually an "ad" in NMPC's Link magazine that said there was an aircrew yeoman post open at Offutt flying on E-4s. I was really thinking of going for it but the wife (now ex) time balked at moving to Nebraska.