Nasa unveils quiet supersonic aircraft in effort to revive commercial flights

In launch event on Friday, agency shared plans to test over US cities to see if it's quiet enough by engaging the people below'

Nasa has unveiled a one-of-a-kind quiet supersonic aircraft as part of the US space agency's mission to make commercial supersonic flight possible.

In a joint ceremony with Lockheed Martin Skunk Works in Palmdale, California, on Friday, Nasa revealed the X-59, an experimental aircraft that is expected to fly at 1.4 times the speed of sound - or 925mph (1,488 km/h).