The National Interest on MSN4d
The X-15 was a Starfighter in All But Name
The X-15 was a key bridge between conventional atmospheric flight and spaceflight. The North American X-15 is one of the most ...
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The U.S. Air Force Went to Space on the North American X-15
The X-15 is the only conventional ... The question of how to transport American personnel and supplies to space has long been settled; we launch our wares atop rockets, which take-off vertically ...