Doomsday plane: US Air Force will pay $13 billion for E-4B replacement
Sierra Nevada Corporation was awarded with a contract to develop platform for new Survival Airborne Operations Center (SAOC)
Nightwatch
US races against time to renew “Doomsday” aircraft fleet
Designed to withstand a nuclear attack, Boeing E-4B Nightwatch jets are close to completing 50 years of service with the US Air Force with no replacement in sight.