In 1955, NACA test pilot Joe Walker cowboys up in the cockpit of an X-1A. That version of the X-1 was designed for research flights at Mach 2 and above, and at altitudes exceeding 90,000 feet.
July 4, 2010 6:00 AM PDT
Photo by: NASA
| Caption by: Jonathan Skillings
Conversation powered by Livefyre