A couple of weeks after it secured a $13 billion contract to supply the Air Force's replacement for the E-4B Nightwatch airborne command and control aircraft, Sierra Nevada Corporation bought five Boeing 747-8s from Korean Airlines for about $135 million each. The contract stipulates four-engine aircraft for what has been renamed the Survivable Airborne Operations Center (SAOC). SNC hasn't confirmed the Korean planes will be used for the contract, but there's not much doubt about that. The 747 is no longer in production so the used market was the only place to go for replacement platforms.
This is a companion discussion topic for the original entry at https://www.avweb.com/aviation-news/used-747-8s-likely-next-command-and-control-aircraft