#TIL about sonic boom refraction in the upper atmosphere https://gizmodo.com/faa-takes-first-step-to-scrap-the-ban-on-supersonic-flights-over-the-u-s-2000779632
GizmodoFAA Takes First Step to Scrap the Ban on Supersonic Flights Over the U.S.Sean Duffy says new tech makes it safer for people on the ground who are worried about sonic booms.