The United States once poured money and political capital into a spaceplane concept that promised to take off from a runway, reach orbit in a single leap, and slash the cost of spaceflight. Instead of ...

For 73 seconds, a crowd of excited Americans looked to the sky in wonder and awe as they waved goodbye to the crew aboard ...

As the nation approaches the 40th anniversary of the loss of the Challenger STS-51-L crew on Jan. 28, 1986, the Challenger ...

That kind of strong leadership and great teamwork are the real safety systems of spaceflight.

The United States ended its crewed space shuttle program with the launch of Atlantis on July 8, 2011, and landing on July 21, 2011. China and Russia are the only other countries to have independent ...