“Seeing an X-Plane's Sonic Boom” was uploaded to Flickr

This schlieren image shows an Air Force Test Pilot School T-38 in a transonic state, meaning the aircraft is transitioning from a subsonic speed to supersonic. via NASA ift.tt/2kHqUNB
embiggen by clicking http://ift.tt/2AWOyN6
Seeing an X-Plane's Sonic Boom was taken on December 14, 2017 at 09:58AM