PBS NewsHour Weekend full episode April 22, 2017

On this episode for Saturday, April 22, thousands of people join the March for Science across the country and scientists gear up to run for office. Later, France prepares to hold a presidential election. Hari Sreenivasan anchors from New York.
Aired: 4/22/2017 | 0:25:03 | Expires: 5/22/2017
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