"Gulfstream's new G650.. the world's fastest supersonic jet ... 646 miles per hour. "
Problem is that 646 MPH isn't supersonic.
"the sonic boom.. one of the Concorde's largest obstacles... grounded the experimental craft in November of 2003.."
The Concorde wasn't experimental, and the sonic boom wasn't what grounded it. However they got the year right , 2003.
Who writes this c*ap?