United Airlines Wants to Bring Back Supersonic Air Travel - The New York Times

United Airlines' Bet on Supersonic Flight Faces Financial, Tech Hurdles

Faster Than the Speed of Sound, but at What Cost? - The New York Times

Echoing the Concorde, American is buying supersonic planes from

American Airlines to Buy Supersonic Planes That Will Fly Nearly Twice the Speed of Sound

United Airlines wants to bring back supersonic air travel

Boom Supersonic Announces First Flight of XB-1 Jet Demonstrator

Boom Supersonic announces significant Overture program advances - Skies Mag

United Airlines to bring back supersonic flying with Boom deal

United Airlines to bring back supersonic flying with Boom deal