Virgin Galactic’s new SpaceShipTwo, unveiled this week, is the first real (near) space program for paying tourists. But casting a shadow is the devastating Virgin Galactic test flight accident last year that took the life of Virgin Galactic co-pilot Michael Alsbury. No doubt VG will have learned from the tragedy, and the new space plane will be the better for it, but how will the company sustain that level of safety? Don’t count on federal regulations. The responsibility is with the engineers.