“The doomsday plane can reportedly withstand a nuclear bomb, asteroid blasts and terror attacks while staying airborne for days without refueling.
What sort of a thing could do all that?”
I think the writer is referring to radiation. Not the blast itself. It’s my guess that all of the electronic components are rad-hardened. The reason that a mil-spec gate costs $100 vs it’s 10 cent commercial counterpart. Lacking mil spec electronics in modern autos, the prepper crowd gets around this by keeping a pre 70’s vehicle on hand.
If it was really “radiation proof”, it would never get off of the ground even with 12 engines, and collapse of its own weight anyway.