the noise is so loud and so powerful it could knock out glass windows. well now high speed intercontinental travel is poised for a quieter comeback. p cbs' barry petersen shows us ho ♪ ♪ >> reporter: this is animation of lockheed martin and nasa's experimental x-59 which may flyd martin and fas next year, that could launch an era-of-supersonic jet flights across america... ...by muting the sonic boom that ended supersonic flights over the u.s., in 1973. if it worked the x-59 will sound about like a neighbor closing car door. to do that the plane is almost mirror smooth because any bump makes the sonic boom worse and to do that, engineers eliminated