The Boeing E-4 Advanced Airborne Command Post with a project name of Nightwatch is an aircraft operated by the United States Air Force (USAF). To create the E-4 series four Boeing 747-200 airframes were specially modified to serve as a survivable mobile command post for the National Command Authority including the President of the United States the Secretary of Defense and successors.
Made by Boeing.
It is the successor of the Boeing 747 .