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What drove a company of US soldiers to commit the worst atrocity in US military history?

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The story of the modern environmental movement.

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Airs Monday, March 28, 2011 at 9 p.m. Check local listings.

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Wyatt Earp came to epitomize the marshal responsible for taming the Wild West.

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During the offensive against Germany, Americans faced a moral and strategic dilemma.

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Four Corpsmen share experiences of hard work and brotherhood from their time in the CCC.

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A preview of Geronimo, the controversial Native American leader.

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Born in Puerto Rico, Roberto Clemente was an exceptional baseball player and humanitarian.

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The life of Kit Carson embodies the contradictions in the story of the American West.

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On February 1, 1913, New Yorkers rushed to see the opening of Grand Central Station.

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Oppenheimer was tasked with the development of the atomic bomb during World War II.

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Buffalo Bill Cody was a meager plainsman turned international celebrity and frontier hero.