The age of supersonic flight is returning to commercial aircraft. Aerion, based in Reno, NV, has confirmed an order for 20 AS20 aircraft by Flexjet. Using carbon fiber technology, the AS20 will have a 30-foot long cabin and hold 8-12 passengers. It will travel at speeds of up to MACH 1.5 or 990 mph. This cuts 3 hours off a transatlantic flight and 6 hours for a transpacific flight. Fuel burn will be high at 1,000 gallons per hours. Aerion, working in conjunction with Airbus, hopes to have the aircraft ready for flight in 2021 and FAA certification by 2023. The last Concorde supersonic flight was in 2003.