Wikipedia:POTD column/January 30, 2006

The planes that serve as Air Force One can be operated as a military command center in the event of an incident such as a nuclear attack. Operational modifications include aerial refueling capability, electronic countermeasures (ECMs) which jam enemy radar, and flares to avoid heat-seeking missiles. The heavily shielded electronics onboard include around twice the amount of wiring found in a regular 747.

Photo credit: United States Air Force
Archive - Nominate new image