The restriction is only on flying supersonic over land or such that a sonic boom hits land. <br /><br />I personally have gone mach 2 over open ocean in a civilian owned aircraft.<br /><br />Furthermore, such restrictions do not apply to private suborbital aircraft, such as SpaceShipOne, which, as you might recall, reached a peak of Mach 3.5 last year over the Mojave Desert, which, I believe, is land of the United States, so, smarty pants, what do you say now?<br /><br />As for Dobbins: there are five supersonic vehicles under construction at Scaled Composites for a commercial airline (The Virgin Group), or don't you read the newspapers? There is also the Xerus vehicle under construction at XCOR, as well as several other private commercial projects.<br /><br />I might also point out the BD-10, which, while it had a spotty safety record, was also a completely privately developed and commercially sold supersonic jet.<br /><br />Denigrating private owners of supersonic jets is inappropriate, because you are talking about supersonic military fighter (i.e. 1-2 seats) technology, neither of which carries passengers or which any commercial airline would operate, subsonic or supersonic. I would point out that the US military operates absolutely no supersonic bombers, transports or any other aircraft other than fighters, so expecting civilian transfer of supersonic technology to airline passenger aircraft is a straw man. If the military doesn't find big supersonic troop transports feasible, there is no reason to expect the airlines to do so. <br /><br />Passenger capacity for supersonics and suborbitals will remain in the 1-8 person range for a good decade or more no matter who owns and operates them.