The discovery of the kite that could fly in the air by the Chinese started humans thinking about flying.
Humans try to fly like birds
For many centuries, humans have tried to fly just like the birds. Wings made of feathers or light weight wood have been attached to arms to test their ability to fly. The results were often disastrous as the muscles of the human arms are not like a birds and can not move with the strength of a bird.
The first practical demonstration of air freight occurred in November 1910 when a department store shipped a bolt of silk by air from Dayton to Columbus, Ohio.
National Air Transport, one of the companies that originally made up United Airlines, was founded on November 14, 1926, for the purpose of carrying parcels. This airline delivered the first air cargo in the United States on September 1, 1927, between Dallas and New York.