They prohibited supersonic planes "because of noise". Moreover, they even prohibited military training flights with speeds higher than speed of sound. Do you remember when you heard that supersonic double-boom last time? For whatever reason they don't want humans travel faster than speed of sound at all. And that is all over the world, not only in US and Russia.
That was not a problem from 1970s, when two supersonic passenger plane models was in commercial service to early 2000 when last Concord was dismissed. Also it was not a problem for military up to 2000s I think.
They prohibited supersonic planes "because of noise". Moreover, they even prohibited military training flights with speeds higher than speed of sound. Do you remember when you heard that supersonic double-boom last time? For whatever reason they don't want humans travel faster than speed of sound at all. And that is all over the world, not only in US and Russia.
That was not a problem from 1970s, when two supersonic passenger plane models was in commercial service to early 2000 when last Concord was dismissed. Also it was not a problem for military up to 2000s I think.