Race to be first with 'son of supersonic'
Bryony Jones, CNN
June 21, 2011 7:20 a.m. EDT
An artist's impression of Hyper Mach's SonicStar.
STORY HIGHLIGHTS
Two designs for "hypersonic" aircraft unveiled at Paris Air Show
"Zero Emission Hyper Sonic Transport" will travel at around 5,000 kmh
"SonicStar" will fly at twice the speed of Concorde
Some doubt the technology will work commercially
link-
http://www.cnn.com/2011/TECH/innovation/06/21/concorde.hyper.sonic/index.html?hpt=hp_c1