"the noise should be audible from the ground only as a car door slamming shut" That still sounds awful, and I imagine it isn't good for wildlife. Also, I'm be

"the noise should be audible from the ground only as a car door slamming shut" That still sounds awful, and I imagine it isn't good for wildlife. Also, I'm betting this would still be very expensive, but it is cool to see passenger supersonic possibly making a comeback. On the otherhand...I wonder if this is mainly to kick Boeing while they're down.