S1, E2: Fighting with a river. Pioneers settled a valley on the virgin river near Zion NP. Stunning in its beauty, the river proved to be too much. Uniting the United States was a constant challenge, and Ken and Brenda look at the last communication method that used flesh and blood to operate across the west. Knightsville was known as much for what it didn't have and the man behind it, Jessie Knight.