https://metro.co.uk/2025/06/18/us-doomsday-plane-spotted-dc-everything-need-know-boeing-e4b-23449241/EXCERPT:
"A US Air Force E-4B aircraft landed near Washington, DC, heightening speculation as President Donald Trump weighs joining the war between Iran and Israel.
The ‘Nightwatch’ aircraft nicknamed the presidential ‘Doomsday Plane’ touched down at Joint Base Andrews in Maryland on Tuesday night.
It departed from Barksdale Air Force Base in Shreveport, Louisiana, and took a very unusual flight path to arrive close to DC, i24NEWS reported.
The White House did not immediately respond to a request for comment from Metro on the Boeing E-4B’s mission, if it was related to the Iran-Israel conflict and whether Trump was on board.
Why is the E-4B called the Doomsday Plane?
Unlike Air Force One which is known as the ‘flying Oval Office’, the E-4B Nightwatch is essentially a ‘flying war room’.
It is referred to as the Doomsday Plane because it has thermal and nuclear shielding designed to withstand nuclear blasts, and an electrical system that is immune to electromagnetic pulses.
The plane has the ability to fly for 12 hours without needing to refuel."
[Continues]:
https://metro.co.uk/2025/06/18/us-doomsday-plane-spotted-dc-everything-need-know-boeing-e4b-23449241/------X
Thanks to Cryptogon for the link:
https://www.cryptogon.com/ 
AngryWhiteKeyboardWarrior 1 points 5 hours ago
I used to see an E-4B flying around Omaha Nebraska back in the late 1980's. It was pretty cool when you realized it wasn't just a normal airliner.