See inside the E-4B 'Nightwatch,' nicknamed the 'doomsday plane' for its ability to help US presidents survive nuclear war

The E-4B 'Nightwatch,' known as the 'doomsday plane,' can survive a nuclear attack and functions as a mobile command center for US military officials.

While many of its features are classified, the US Air Force reveals that the E-4B is designed to protect high-level officials during catastrophic events.

Air Force One serves as the US president's flying workspace, but the E-4B takes on the critical role of a 'flying war room' in emergencies.

Operating the E-4B is expensive, costing $159,529 per hour, making it the US Air Force's most costly aircraft to maintain.

Read at Business Insider