I noticed there are at least 3 x E-6 aircraft flying at present (call signs: MAYO38
, NANA67
, and one more which may have landed before I grabbed it), along with an E-4B.
These aircraft are said to house Military Generals and other important people during times of nuclear escalation.
Is it common for there to be 3 or more E-6 aircraft airborne at the same time?