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From the 1960s to today, US Presidents have talked about saving our environment.
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Around age 12, Robert Stone created a short film on environmental pollution.
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Lt. Calley's 1971 trial upset those who felt he was unfairly blamed for Vietnam mistakes.
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What were environmental conditions like in the US in the early 1960s?
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What were Native American children expected to learn in schools run by the US government?
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White Americans offered Native Americans equality -- if they became more like them.
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The Trail of Tears march caused the death of more than 4,000 Cherokee people.
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Annawon Weeden, a Mashpee Wampanoag, comments on the importance of the series.