Since the last flight of the Concorde in 2003, supersonic travel has been the province of jet fighter pilots and Felix Baumgartner.
XCOR Aerospace wants to change that. Out of a group of outfits looking to bring back travel faster than the speed of sound, it has an especially intriguing idea: flying from one airport to another, via outer space.
Source: Business Insider. Read full article. (link)