https://simpleflying.com/boeing-707-barrel-roll-seattle/
The_barrel_roll over Seattle in 1955 by test pilot Alvin_M._Johnston.
https://www.historylink.org/File/21030
https://www.smithsonianbooks.com/store/aviation-military-history/tex-johnston-jet-age-test-pilot
https://www.goodreads.com/book/show/2387144.Tex_Johnston
What happens if you ROLL an airliner? https://www.youtube.com/watch?v=JhzaogGQNFU
