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PBS NewsHour

Cloning Trees at the Tidal Basin

2:19

Plant geneticist Margaret Pooler explains how horticulturists have been propagating the 1912 cherry trees along Washington, D.C.'s Tidal Basin in order to preserve their heritage and create new trees.

Episodes of PBS NewsHour42

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Previews of PBS NewsHour3

PBS NewsHour

State of the Union 2016

PBS NEWSHOUR offers live coverage of President Obama's speech and the Republican response.

0:20

PBS NewsHour

PBS NewsHour Weekend

Premieres Saturday, September 7, 2013 at 6 p.m. ET.

0:30

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