Joe Engle, the last surviving member of the test pilots who skimmed the edge of space on the X-15 rocket plane in the 1960s and who later orbited the Earth on space-shuttle missions, died July 10 ...

The X-15 is a legendary and pivotal part of aviation history. Designed to fly high and fast, it tested the limits of ...

NASA test pilot Milt Thompson remembered the experience in his book At the Edge of Space: “[The launch] was a surprise no matter how many times I went through it. It felt as if the X-15 exploded ...