The Boeing E-4 Advanced Airborne Command Post, with a project name of "Nightwatch", is an aircraft operated by the United States Air Force and is specially built 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.
Airplanes - Military - Parked - Utility
Links: en.wikipedia.org, www.airliners.net
By: kjfitz
http://www.youtube.com/watch?v=SMK5bmdAEHc