GE’s Affinity will be the first civil supersonic engine in 55 years. Get an inside look at the makings of an engine capable of speeds faster than 768 mph, beyond the speed of sound. | GE

The story of how a large aerospace company, BAE Systems, began a secret project to counter the force of gravity while NASA simultaneously ran a similar 'Breakthrough Propulsion Physics' program. #ScienceChannel #SpacesDeepestSecrets | Science Channel