American Airlines to buy supersonic jets as it bets on ultra-fast travel

American Airlines Group Inc on Tuesday agreed to buy up to 20 ultra-fast jets from Boom Supersonic, with an option to purchase 40 more, becoming the second major U.S. airline to bet on supersonic passenger travel.

American has made a non-refundable deposit on the initial 20 Overture jets, the companies said in a joint statement, without disclosing the size of the deposit.