Why was the Doomsday Plane flying over the U.S last week — are fears of an attack on U.S soil imminent?

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A 'Doomsday' plane flight across the U.S. sparked alarm amid rising tensions with Iran, raising fears of impending conflict. The Air Force clarified that the flight of the Boeing E-4B 'Nightwatch' was a routine, pre-scheduled mission unrelated to Middle Eastern events. This airborne command post is designed to withstand a nuclear attack and coordinate military operations in an emergency.