Fifty.
No.
Sixty years ago, Western countries began researching supersonic airliners. After more than a decade, the UK and France developed the Mach 2 Concorde.
Super fast.
It was known as the "Never-setting sun" because its flight speed exceeded the Earth's rotation speed. In the evening, flying westwards, the sun would always remain at dusk.
Thus.
It was a sensation for a while.
Very popular.
A large number of people flocked to experience the halved flight time.
However.
It did not become widespread. In 2003, after the last Concorde retired, there were no more supersonic civil aviation routes globally.
There were many reasons.
Internal.
External.
Continuous setbacks made what was once a great project cold down. Later, when major aviation manufacturing companies saw this, they all slowed down their pace.
Like this.
Decades have passed.
