The last time anyone other than a fighter pilot went supersonic was 20 years ago. Today you can only visit a Concorde in a handful of museums, it's a relic, left behind by an industry that invested in efficiency rather than speed. Now companies are investing billions of dollars in bringing commercial Mach speed flight back, but this path to supersonic travel isn’t going to be easy. Business Insider's Daniel Allen looks at the key reasons that bringing supersonic back is almost impossible. Editor's Note: At 13:15, the host describes the black material on Concorde's wings as heat shielding. The material is actually part of the plane's ice protection system. 00:00 - Why Is it So Hard To Bring Back Supersonic? 00:57 - The Concorde 04:37 - Challenge 1: Noise 13:15 - Challenge 2: Heat 16:39 - Challenge 3: Development 24:30 - Challenge 4: Efficiency 31:56 - Challenge 5: The Market 34:13 - Credits ------------------------------------------------------ #supersonic #impossible #businessinsi...