Marshmallow Launch at the White House Science Fair
February 07, 2012 | 3:01
The President meets an 8th grader named Joey from Phoenix, AZ at the White House Science Fair and the two launch a marshmallow across the state dining room with Joey's science project - an air cannon.
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February 27, 2012
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February 27, 2012
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February 27, 2012
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February 27, 2012
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February 27, 2012
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February 27, 2012
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February 27, 2012
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February 27, 2012
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