National Security Journal on MSN

Mach 6 SR-72 Darkstar Could Soon Be the ‘Fastest Plane on Earth’

SR-72 Could Soon Replace SR-71 As Fastest Plane Ever? Yes, the SR-71 Blackbird officially remains the fastest acknowledged ...
National Security Journal on MSN

Mach 9.6 X-43A ‘Hypersonic Scramjet’ Has a Message for Any Military on Earth

A, an unmanned scramjet testbed, set the world record for an air-breathing aircraft by hitting Mach 9.6 in 2004. -Launched ...