that NASA is developing a Concorde 2.

Or that's what the article said, not another type of SST but Concorde 2.

https://www.luxurytraveldiary.com/20...t-three-hours/

It aims to address one of the main complaints about the original Concorde, which is the sonic boom, by flying at 55,000 feet instead of 30,000 and also operate at 60 instead of 90 dBs.

Here's an older article which covers the history and also new designs:

http://www.telegraph.co.uk/finance/n...sonic-jet.html

Hmm, some of these talk about 20 passengers so it's for the truly jetset, who've been slumming in Gulfstreams.

The 1-hour NY to London sounds intriguing but after Brexit, there may not be as many potential clients needing to make that trip.