stuart: it's happened just now boom supersonic taken off graddy watching this flight how long until it> just five minutes stu we saw it take off in front of us here up there somewhere we kind of lost sight of it over the last few minutes. and right now it is flying at mock point 8 which is roughly the speed of a conventional airliner. the goal is to get up to mock 1.1 mock 1 being sound barrier so 1.1 above that means they would have broken the sound barrier and as i said we're expecting that in the next four to five minutes or so. this shot that you're seeing right now is pretty remarkable there's one chase plane that's observing xb1 which is prototype plane and then there's another plane that is providing this live feed of the plane in the air as we speak. and, of course, this as i noted is a test flight this is a prototype plane the goal is to take this one-third scale prototype and essentially increase the size of it and then that would become the commercial jetliner that boom hopes to have in the skies in about five years time. as i look at the screen right now, our feed is delaye