"This image makes the invisible visible — the first American made civil supersonic jet breaking the sound barrier." ...

But while the successful test flight of XB-1 shows that supersonic flight without sonic booms is technically feasible, the ...

Boom Supersonic announced Monday that its airliner could fly above Mach 1 without producing a sonic boom audible from the ground. As Concorde could only fly supersonic over water, this discovery ...