Why was Concorde fleet finally grounded? (Read the text and answer the question)

Human beings conquered distance by discovering wheels.

'Aka airplane' carried one passenger.

The Wright brothers made the first experiment of flying in a plane that rose above by its own power and finally landed without damage.

Yes, I think so. People remember the 'aka airplane'. Because it was the first machine that flew naturally in a smooth speed with a man, and finally landed without damage

Airbus 350 is a modern passenger airplane with a speed of 945 km/h. It is expected to fly in a couple of years.

Boeing and Airbus are modern aircraft companies that are producing modern passenger airplanes.