The primary witness and his wife were in a boat on their lake. Their 9 year old son had fallen from his ski close to the shore, and as they were picking up the ski they had to stop the boat. The witness looked up in the clear blue sky to the right over the tree line and saw a white round object traveling from right to left (E-W) at a high rate of speed. The object was traveling faster than anything he had ever seen and couldn't have been visible over a minute or two. It travelled the entire length of the sky and then disappeared. They had seen airplanes in the sky prior to and just after this incident, but nothing was travelling anywhere near the speed this was. He had pointed to the object in the air and his son said that he saw the same thing. As his wife looked up she HAD also saw the object as well. The object probably had been at about 10,000' and about a mile out. 1-2 mins