X-51A WaveRider hypersonic missile successfully hits Mach 5.1 in final test
As they say, impossible is nothing!
Now Mach 5.1 or about a mile a second…
http://www.theverge.com/2013/5/4/4298270/x-51a-waverider-hypersonic-missile-successfully-hits-mach-5-1-in
