E-4B (Comms)

The Boeing E-4B is a militarized version of the Boeing 747-200, serving as an Advanced Airborne Command Post (AACP) for the United States Air Force. It is designed to provide a survivable command, control, and communications center for the President and Secretary of Defense during a national emergency or nuclear war.

Developed in the United States in the 1970s, the E-4B entered service in 1980 and has been continuously upgraded to maintain its role as a critical national asset during emergencies.