HyperDrive| 8 April 2012
Concorde returns: Supersonic jets ready for take-off
Jon Stewart
Science & Environment
Supersonic stealth A conceptual design for a supersonic bi-plane that would be cheaper, quieter and more fuel-efficient. (Copyright: MIT)
Concorde may have retired but a number of projects hope to bring supersonic air travel back to the masses.
link-
http://www.bbc.com/future/story/20120405-supersonic-jets-ready-to-take-off