The E-4B "Doomsday" aircraft serves as a nuclear attack survivable mobile command post for the National Command Authority, namely the President of the United States, the Secretary of Defense, and successors. considered to be 'hardened' against the effects of electromagnetic pulse (EMP) from a nuclear blast. Two of the four aircraft that exist were recently damaged during a tornado at Offutt AFB. The aircraft is the preferred platform for the Secretary of Defense travel and the President in times of threat. The E-4B is capable of operating with a crew up to 112 people including flight and mission personnel, the largest crew of any aircraft in US Air Force history. With in-flight aerial refueling it is capable of remaining airborne for up to a week in the event of an emergency. Many are unaware of this important aircraft. A picture of one flying over Washington DC during the 9/11 crisis made headlines as a mystery aircraft. When the President is aboard, the planes call sign becomes "Air Force One." It was my job during modification of the aircraft to trudge out to the flight shack on the runway each day, rain, snow, ice, etc. and meet with Operations personnel to coordinate repair and replacement of hardware with suppliers around the world. It was a job I took very seriously due to the important mission of the aircraft.
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