scramjet

The American military has successfully tested a 'scramjet' powered aircraft that reached the insane hypersonic speed of Mach
The trial flight of a new hypersonic plane which could have eventually led to 60 minute flights from London to New York failed
The US military will test a new hypersonic plane on Tuesday which could eventually lead to flights from London to New York
Planes travelling at five times the speed of sound and passenger aircraft flying in formation could come to pass in the last