UFO seen in Marshalltown Iowa in 1956

Summary

A witness in Marshalltown, Iowa, reported in 1956 a round white object the size of a pea. The bright object traveled east to west in a straight line for five minutes before fading from view. The observation was made from the backyard while the witness was drinking beer. Although a balloon was considered, it was concluded that it could be an aircraft. The lack of precise data made a definitive evaluation difficult.