"The Flying Machine" is a short story written by Ray Bradbury in 1953.
The Emperor Yuan notices a man who has created a contraption for flying.
Thus Yuan orders that the inventor shall be executed because, while his flying machine may be a beautiful creation, the emperor sees the devastating potential for those who "have an evil face and an evil heart" and will seek to use it for purposes other than the enjoyment of flight, namely flying over the Great Wall of China and destroying it.
For this reason, the inventor is executed, the flying machine is burned, and all who saw it are silenced.
But in the last line the Emperor mourns the loss of the machine, the marvel of which he appreciates but the danger of which is too great to allow its survival.