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People hold up signs at a rally before the march for Science April 22, 2017 in New York. Scientists and their supporters across the globe are expected to march in the thousands Saturday amid growing anxiety over what many see as a mounting political assault on facts and evidence.
People hold up signs at a rally before the march for Science April 22, 2017 in New York. Scientists and their supporters across the globe are expected to march in the thousands Saturday amid growing anxiety over what many see as a mounting political assault on facts and evidence.

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    Protesters to Trump: Science matters

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Protesters to Trump: Science matters

Protesters rally at the New York City March for Science in response to President Trump's environmental and energy policies. CNN's Rachel Crane reports.

Protesters to Trump: Science matters

Protesters rally at the New York City March for Science in response to President Trump's environmental and energy policies. CNN's Rachel Crane reports.