When I was reporting for the Des Moines Register in 1985, I wrote a story about Omaha-based Godfather’s Pizza magnate Willy Theisen’s $500,000 40th birthday celebration trip to London aboard the supersonic Concorde with nearly 100 friends. It’s been 15 years since Concorde retired, leaving us without an easy way to get to Paris on a day trip. But CNBC says supersonic travel could be back within four years. Several companies are building new jets that will go twice the speed of sound. Boeing has a model of a hypersonic plane that would top out at five times the speed of sound, meaning a two-hour flight from Sydney to San Francisco.