[rbanffy]

I can't wait to see NASA's one. What I really hope is Mach 2 at altitudes higher than the Concorde, in order to minimize sonic booms on land. Even if we never get to fly supersonic over land again, a Mach 2 plane that can cross the Pacific would be incredible.

[creer]

The work to minimize or delete sonic boom - that's an important one. And it's a NASA project.