It has been 35 years since NASA pilot Bill Dana landed an X-15 on the dusty lakebed at Edwards Air Force Base. It was Oct. 24, 1968, and Dana had just completed the 199th flight in the X-15 program. He was eager for another turn in the cockpit because a high-altitude camera experiment did not go well that day, and he wanted to repeat the test. It was not to be. The X-15 program was ended less than two months later, before the 200th flight could be made, and Dana would carry the distinction of being the last pilot to...