The Concorde made its final flight in 2003, marking the end of supersonic passenger service. Boom Supersonic aims to restart it. Their passenger jet design, dubbed the Overture, is a 55-seat craft built using lightweight carbon composites and a highly aerodynamic design. The resulting fuel efficiency will allow seats to be sold at roughly the same price as a standard business class seat, but with the trip taking far less time thanks to a top speed of Mach 2.2. That means New York to London in 3.5 hours, San Fransisco to Tokyo in 5.5, and Sydney to LA in under 7. While Boom has been working on the design since 2014, they just received an influx of cash to help it over the finish line, beginning with the completion and testing of a one-third scale manned prototype — dubbed the Baby Boom — later this year. The company expects to begin passenger service in the mid-2020s.