US Doomsday nuclear plane spotted in Washington: Why is it called the 'flying Pentagon'

The US military’s E-4B Nightwatch, the airborne command centre designed for nuclear war and national catastrophe, was spotted on an unusual multi-city flight, prompting scrutiny. The rare public appearance drew attention to the aircraft’s role as the National Airborne Operations Center, its extreme survivability features, and its function within the US nuclear command system during worst-case scenarios.