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                The E-4B serves as the National Airborne
                Operations Center (NAOC) for the National Command Authorities.
                In case of a national emergency or destruction of ground command
                control centers, the aircraft provides a modern, highly
                survivable, command, control and communications center to direct
                U.S. forces, execute emergency war orders and coordinate actions
                by civil authorities.The E-4B evolved from the E-4A, which had
                been in service since late-1974. The first B-model was delivered
                to the Air Force in January 1980, and by 1985 all aircraft were
                converted to E-4B standard. These aircraft are assigned to the
                55th Wing, Offutt AFB, NE.  In August 1994, the E-4B assumed an
                additional role. With the approval of the JCS chairman, the E-4B
                will support the Federal Emergency Management Agency's (FEMA)
                request for assistance when a natural disaster occurs. The E-4B
                would be tasked to fly the FEMA Emergency Response Team to the
                disaster site, and become the FEMA command and control center
                until the emergency team's own equipment and facilities can be
                set up. With E-4B support, the emergency team's response is a
                matter of hours, as opposed to days.
 Air Combat Command (ACC) is the Air Force
                single-resource manager for the E-4B, and provides aircrew,
                maintenance, security and communications support. The Joint
                Chiefs of Staff actually control E-4B operations and provide
                personnel for the airborne operations center.  To provide direct support to the National
                Command Authorities, at least one E-4B is always on alert at one
                of many selected bases throughout the world.
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