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X-20
Stories From X-20
Mach 18: Boeing's X-20 Dyna-Soar Bomber Looked Like a Game Changer
X-20: NASA Had Plans for a Space Plane That Could Go 17,500 MPH
If They Got Off the Ground, These Aircraft Would Have Changed the World
This Space Shuttle Was Built By Soviets, Not Americans
Boeing’s X-20 Dyna-Soar: Was This Hypersonic Space Bomber Too Good To Be True?
