How did president truman react to the north korean invation of south korea

After North Korea invaded South Korea in June 1950, US President Harry S. Truman decided to enter into that Asian conflict by ordering the air and naval forces to retaliate on South Korea, after the advice that these forces would be enough to stop the invaders and there would not be any need of ground presence. The fear of expansion of Communism was the main reason of this decision, trying not to lose another country under that regime.

It seems that you have missed the necessary options for us to answer this question, so I had to look for it. Anyway, here is the answer. The remote town of Supai, which sits at the bottom of the Grand Canyon, is known for its unusual distinction which is Mail Delivery by Mule. Hope this answers your question.