During WWI, this German sub sailed into a US harbor — uninvited

Sailors lined the railings of American destroyers in Newport Harbor, staring in disbelief at the sight before them. Under a bright blue sky, a large gray submarine floated gently on the placid waters of Rhode Island’s Narragansett Bay, within hailing distance of Naval Station Newport, then known as Newport Training Station. The U.S. Naval War College sat on the far side of tiny Coasters…