"Doomsday planes" serve as airborne command ... Curiously, the third model had GE F103 engines, which eventually replaced the propulsion of the earlier models. By January 1985, the older planes ...

Growing concerns about a possible nuclear war and other global threats have pushed forward the symbolic Doomsday Clock by 30 seconds - to just two minutes before midnight. The Bulletin of the ...

With four massive engines, the E-4B can fly for 12 hours ... which is why it's affectionately known as the "doomsday plane." Narrator: Four E-4Bs make up the National Airborne Operations Center.