A U.S. Warship Fires an Anti-Sub Weapon on a German U-Boat | MYSTHIST | Channify

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The USS Guadalcanal has spotted a German sub in the waters off the coast of Madeira. They immediately order a strike with the navy's new and devastating weapon: the hedgehog. From the Series: Hell Below: U-Boat Killers http://bit.ly/2JWWjpU