The government studied proposals for a manned, hypersonic, stealth spy plane capable of traveling at a speed of up to mach 5.

enabling the aircraft to achieve hypersonic flight at speeds of over 5 Mach once airborne. It has not been publicly disclosed if the final craft will be fully autonomous or manned. It is hoped ...

Kratos Defense & Security Solutions has unveiled an internally funded effort to develop a hypersonic drone capable of ...