Supersonic aircraft have been criticized by environmentalists for burning more fuel per passenger than comparable subsonic ...

When the U.S. looked to build a supersonic airliner, the Lockheed L-2000 came within reach of becoming a commercial mainstay.

The Concorde suffered a fatal crash in July 2000, which spurred the end of the supersonic jet program. What's next for mach speed flight?

It was supposed to be a Soviet triumph. Instead, it became the most public crash in the history of Cold War aviation. A ...