I have no love for this article, but everyone should be able to agree on a couple of points: (1) Cutting the size of the potential market by an order of magnitu

I have no love for this article, but everyone should be able to agree on a couple of points: (1) Cutting the size of the potential market by an order of magnitude can be the difference between economical and uneconomical. (2) Limitations on negative noise externalities should be implemented based on actual noise produced (dB, or whatever), not on whether the aircraft is supersonic per se.