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Senate Blocks Attempt to Prevent Debate on Gun Legislation

Senate Blocks Attempt to Prevent Debate on Gun Legislation

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News Wrap: Senators Work on Immigration Reform Bill

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Korean War Army Chaplain Awarded Medal of Honor

Korean War Army Chaplain Awarded Medal of Honor

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Shields and Brooks on Obama's Budget, Senate Gun Fight

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Online TV Service Tests Traditional Broadcast Networks

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PBS News Hour

Cloning Trees at the Tidal Basin

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.
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