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flag The E-4B "Doomsday Plane," a fortified Boeing 747, serves as a mobile command center for nuclear crises.

flag The E-4B "Doomsday Plane," a militarized Boeing 747-200, serves as a command center for the U.S. military in case of a nuclear attack. flag Costing $159,529 per hour to operate, it features nuclear shielding, can withstand electromagnetic pulses, and has 67 satellite dishes for advanced communications. flag Designed to protect the president and other officials, it can refuel mid-flight and operate for days.

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