National Security Journal on MSN

The Mach 6.7 X-15 ‘Hypersonic Rocket Plane’ Has a Message for the U.S. Air Force

The X-15 was a rocket-powered research aircraft that pushed human flight to the edge of space and deep into the hypersonic ...
Morning Overview on MSN

How much did Apollo actually cost the United States?

NASA’s Apollo program, a monumental endeavor spanning from 1961 to 1972, culminated in the historic Apollo 11 mission that ...