The E-4B is referred to as NEACP(pronounced "kneecap") which stands for National Emergency Airborne Command Post. It is fully staffed with Command Post officers and was intended for the event of a nuclear war. There are only 4 in the U.S. Air Force inventory and they are all based at Offutt AFB. However, there is one on alert status at all times to be in the air within minutes. I am not sure if the alert plane sits at Offutt or sits at Andrews AFB with AF1. It, as well as AF1, is capable of withstanding the EMP from a nuclear black and controlling a battle while the ground below is annihalated.
One always does stay close to the Presidents travels, but usually remains out of site as much as possible(i.e.-in a neighboring country). Even though both aircraft are capabe of waging a war from the air, the best reasoning would be that the President would make all decisions from AF1 and it would be passed on to the battlestaff inside the E-4 to make it happen.
I knew nothing of it until when I was in Air Force Basic Training and we got blood drawn. Everyone else had 3 vials drawn, I had 4. When I asked why, they said that my blood had to be tested for flight status clearance. Well, you can imagine my surprise and happiness that something in my job might require me to fly. It was not until I got to Command and Control training at Keesler AFB in Biloxi, MS
that I realized that a lowly Airman Basic like me would not be allowed to fly in the E-4, it would go to commissioned officers. Of the pictures that I have seen of the inside, most of the staff are Majors, Lt. Colonel's, and bird Colonels. Well, my flight status happiness quickly fell into despair that I wouldn't get to fly as easily as I thought. Oh well, you win some, you lose some.
I don't have a microwave, but I do have a clock that occasionally cooks shit.