If Concorde succeeds, her passengers will be hurled across the oceans at twice the height and twice the speed of today's jet travellers.
In a few weeks her make-or-break test flights will begin. They will take up to three years to complete. But for the last ten years some of the best brain-power - and a lot of money - has been ploughed by Britain and France into the making of the Concorde.
Tonight the planemakers tell their story of the race to be first with a supersonic transport - the story of the struggles, the promise, and the possible rewards.
See page 3