https://www.military.com/daily-news/2020/10/05/air-force-delays-moving-forward-e-4b-doomsday-plane-replacement-effort.html
The service said it recently classified its Survivable Airborne Operations Center, or SAOC, Weapon System program.
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https://www.bgr.com/tech/nuke-proof-doomsday-plane-spotted-flying-over-nebraska/
America's doomsday plane was spotted taking off from an Air Force base following Putin's threats about Russian nuclear forces on high alert.
doomsday planenukeproofspottedflying