Xem phim tài liệu - Secrets of the Dead: Death on the Railroad | Episode | PBS
In 1832, railroad contractor, Philip Duffy, hired 57 Irish immigrants to lay railroad tracks in West Chester, Pennsylvania. But, less than two months after their arrival, all 57 were dead. Did they all die -- as was widely believed -- due to a cholera pandemic? Or, were some of them murdered? For more visit www.pbs.org/wnet/secrets
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