References

Books

• Pilot’s Handbook of Aeronautical Knowledge(FAA-H-8083-25B). (2016). Oklahoma City, OK: United States Department of Transportation, Federal Aviation Administration, Airman Testing Standards Branch.

Multimedia

• https://airandspace.si.edu/support/wall-of-honor/elrey-borge-jeppesen-0
• https://www.historynet.com/jimmy-doolittle-reminiscences-about-world-war-ii.htm
• https://simpleflying.com/boeing-707-why/
• https://samchui.com/2019/03/02/concordes-first-flight-fifty-years-ago/#.X9wg2WRKg-Q