Beyond Blue Skies: The Rocket Plane Programs That Led to the Space AgeIn 1945 some experts still considered the so called sound barrier an impenetrable wall, while winged rocket planes remained largely relegated to science fiction. But soon a series of unique rocket powered research aircraft and the dedicated individuals who built, maintained, and flew them began to push the boundaries of flight in aviation's quest to move ever higher, ever faster, toward the unknown. Beyond Blue Skies examines the thirty year period