The US is taking major steps to end its 50-year ban on overland supersonic flight, with the FAA planning new noise-based rules that could open the door to commercial passenger jets travelling at over 700mph — with transatlantic trips in under four hours.

The U.S. is clearing away regulations for a new era of supersonic flight, promising faster long-distance travel without the boom.

Sean Duffy says new tech makes it safer for people on the ground who are worried about sonic booms.