Boom technologies is trying to produce the first supersonic commercial aircraft in 40 or 50 years. I think there's a huge market of people, including myself, that would pay 10, 20, 50,000 dollars. The progress in terms of propulsion and materials and avionics has been pretty traumatic. So I think it's commercially viable. It's a long shot investment. There's a lot that can go wrong. But it is dramatically less difficult, less dangerous and less expensive to fly along at 50,000 feet than going into space.