US Air Force’s 1950s supersonic flying saucer declassified
ttps://www.extremetech.com/extreme/137505-us-air-forces-1950s-supersonic-flying-saucer-declassified
Project 1794: Plans for an Air Force flying saucer (images)
ttps://www.cnet.com/pictures/project-1794-plans-for-an-air-force-flying-saucer-images/
ttps://cnet1.cbsistatic.com/img/3qdwmxJnPTcAgCuVn5KFLw0Cvpw=/980x0/2012/10/05/47f728de-f0e4-11e2-8c7c-d4ae52e62bcc/Project-1794-Cover.png