VIDEO: BOOM'S XB-1 CLEARED FOR SUPERSONIC TEST FLIGHTS

Summary from the TLDR newsletter

The US FAA has given Boom the first-ever Special Flight Authorization to Exceed Mach. The authorization will allow the company's XB-1 prototype to break the sound barrier during its test flights. The permission designated the Black Mountain Supersonic Corridor at Edwards Air Force Base in California and part of the High Altitude Supersonic Corridor within the R-2515 airspace as a permissible area for Boom to conduct supersonic test flights. Boom still has to complete up to 20 subsonic tests before starting supersonic tests.