Notable appearances in media
American Doomsday | National Geographic Channel
https://web.archive.org/web/20131015000331/http://channel.nationalgeographic.com/channel/explorer/videos/american-doomsday/http://channel.nationalgeographic.com/channel/explorer/videos/american-doomsday/
http://channel.nationalgeographic.com/channel/explorer/videos/american-doomsday/Wayback Machine - Wikipedia
https://en.wikipedia.org/wiki/Wayback_MachineAmerican Doomsday | National Geographic Channel
https://web.archive.org/web/20140114145450/http://channel.nationalgeographic.com/channel/explorer/episodes/american-doomsday/http://channel.nationalgeographic.com/channel/explorer/episodes/american-doomsday/
http://channel.nationalgeographic.com/channel/explorer/episodes/american-doomsday/
Specifications (E-4B)
http://www.boeing.com/commercial/747family/pf/pf_classics.html#200
http://www.boeing.com/commercial/747family/pf/pf_classics.html#200
Operational history
Associated Press - Wikipedia
https://en.wikipedia.org/wiki/The_Associated_PressAir Force ‘doomsday’ planes moved to Lincoln airport during Offutt runway replacement
https://www.airforcetimes.com/news/your-air-force/2021/03/14/air-force-doomsday-planes-moved-to-lincoln-airport-during-offutt-runway-replacement/Book sources - Wikipedia
https://en.wikipedia.org/wiki/Special:BookSources/978-0-465-01501-6ISBN - Wikipedia
https://en.wikipedia.org/wiki/ISBN_(identifier)Wayback Machine - Wikipedia
https://en.wikipedia.org/wiki/Wayback_Machinehttps://web.archive.org/web/20131005011150/http://www.defense.gov/news/newsarticle.aspx?id=16996
https://web.archive.org/web/20131005011150/http://www.defense.gov/news/newsarticle.aspx?id=16996News Archive
http://www.defense.gov/news/newsarticle.aspx?id=16996
Design
American Doomsday | National Geographic Channel
https://web.archive.org/web/20131015000331/http://channel.nationalgeographic.com/channel/explorer/videos/american-doomsday/http://channel.nationalgeographic.com/channel/explorer/videos/american-doomsday/
http://channel.nationalgeographic.com/channel/explorer/videos/american-doomsday/Wayback Machine - Wikipedia
https://en.wikipedia.org/wiki/Wayback_MachineAmerican Doomsday | National Geographic Channel
https://web.archive.org/web/20140114145450/http://channel.nationalgeographic.com/channel/explorer/episodes/american-doomsday/http://channel.nationalgeographic.com/channel/explorer/episodes/american-doomsday/
http://channel.nationalgeographic.com/channel/explorer/episodes/american-doomsday/