Note from Karen Pryor: This paper reveals a fascinating piece of scientific detective work by Gail Peterson, Ph.D., a professor of behavior analysis at the University of Minnesota. During World War II, Skinner and some of his graduate students conducted classified research on pigeon-controlled guidance systems, at a secret laboratory in Minneapolis. One day, while waiting for government approval on their next steps, they decided to pass the time by trying to train a pigeon to "bowl."