[ExI] scramjet

[Mike Dougherty]

On Thu, May 27, 2010 at 10:42 PM, Damien Broderick <thespike at satx.rr.com> wrote:
> http://www.pcmag.com/article2/0,2817,2364269,00.asp
> The craft flew at six times the speed of sound for three minutes and 20
> seconds, according to the Associated Press. A B-52 Stratofortress released

> The previous record for a hypersonic scramjet burn was just 12 seconds,
> according to the report.

Aside from the geek factor, why is this good?  What applications
require mach 6+ ?