Tolong jelaskan mengenai Boeing X-20 Dyna-Soar

Boeing X-20 Dyna-Soar ("Dynamic Soarer") adalah program untuk mengembangkan spaceplane Angkatan Udara Amerika Serikat (USAF) yang dapat digunakan untuk berbagai misi militer, termasuk pengintaian, pengeboman, penyelamatan ruang, pemeliharaan satelit, dan sabotase satelit musuh.

Program ini berlangsung dari 24 Oktober 1957 sampai dengan 10 Desember 1963 senilai US $ 660.000.000 ($ 4950000000 hari ini), dan dibatalkan setelah konstruksi pesawat ruang angkasa telah dimulai.

Caidin, Martin. Wings into Space: The History and Future of Winged Space Flight. New York: Holt, Rinehart and Winston Inc., 1964.

Dornberger, Walter R. "The Rocket-Propelled Commercial Airliner". Dyna-Soar: Hypersonic Strategic Weapons System, Research Report No 135.. Minneapolis, Minnesota: University of Minnesota, Institute of Technology, 1956.

Duffy, James P. Target: America, Hitler's Plan to Attack the United States. Santa Barbara, California: Praeger, 2004. ISBN 0-275-96684-4.

Dyna-Soar: Hypersonic Strategic Weapons System: Structure Description Report. Andrews Air Force Base, Maryland: Air Force Systems Command, 1961, pp. 145–189.

Geiger, Clarence J. History of the X-20A Dyna-Soar. Vol. 1: AFSC Historical Publications Series 63-50-I, Document ID ASD-TR-63-50-I. Wright Patterson AFB, Ohio: Aeronautical Systems Division Information Office, 1963.

Godwin, Robert, ed. Dyna-Soar: Hypersonic Strategic Weapons System. Burlington, Ontario, Canada: Apogee Books, 2003. ISBN 1-896522-95-5.

Houchin, Roy. U.S. Hypersonic Research and Development: The Rise and Fall of Dyna-Soar, 1944–1963. London: Routledge, 2006. ISBN 0-415-36281-4.

Neufeld, Michael J. The Rocket and the Reich: Peenemünde and the Coming of the Ballistic Missile Era. New York: The Free Press, 1995. ISBN 978-0-674-77650-0.

Strathy, Charlton G. Dyna-Soar: Hypersonic Strategic Weapons System: Weapon System 464L Abbreviated Development Plan, 1957, pp. 38–75.

Yenne, Bill. The Encyclopedia of US Spacecraft. London: Bison Books, 1985. ISBN 978-5-551-26650-1.

Transonic aerodynamic characteristics of the Dyna-Soar glider and Titan 3 launch vehicle configuration with various fin arrangements (PDF format) NASA report - April 1963

American X-Vehicles: An Inventory X-1 to X-50, SP-2000-4531 - June 2003; NASA online PDF Monograph

Deepcold: Secrets of the Cold War in Space, 1959-1969