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![Beloved Traveling Dog](http://travel.home.sndimg.com/content/dam/images/travel/video/0/02/021/0215/0215312.jpg.rend.hgtvcom.1280.720.suffix/1662652051887.jpeg)
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A dog becomes famous for riding mail trains all over the country.
From: Don Wildman with Greatest Mysteries and Greatest Mysteries: Smithsonian
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