In this week's episode, The History Detectives explored the ruins of a secret, WWII-era dog-training facility on Cat Island, Mississippi. Some loopy scientist thought that dogs could be trained to hunt enemy soldiers based on the "scent of Japanese blood."

[There was a video here]

Check out PBS.org for more secrets, including an amazing interview with a 92-year-old US Army veteran of Japanese descent who was part of the team that attempted to train the dogs.