Fifteen years ago today, the roar of engines and a pillar of fire lit up the Florida sky as Space Shuttle Discovery began its final journey into space.

When a piece of foam struck Columbia’s wing in 2003, the damage went unnoticed until reentry tore the shuttle apart over Texas. In the months that followed, investigators examined a chilling ...

In 1963, a rocket plane built to push aviation to Mach 6 climbed higher than planned and carried NASA pilot Joe Walker past the Karman Line. Decades before the Space Shuttle, the X-15 blurred the line ...