Why Does This Plane Follow The U.S President EVERYWHERE?!

Find out why you never hear about the Doomsday plane, which follows Air Force One everywhere it goes…

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Air Force One is instantly recognisable, for it carries the U.S President across the globe. However, the Doomsday plane is rarely heard of, even though it follows Air Force One everywhere. What is its purpose?

Next: Why is it such a secret?