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　　Journey to the front lines of American history. 　　Watch the Emmy winning history-on-location series. 　　Join Ed Ayers — award-winning historian and co-host of the hit podcast BackStory — as he travels to places that define the most misunderstood parts of America’s past. 　　Visit sites Americans struggle to discuss, and learn from National Park Service interpreters, museum educators, ar... (展开全部)