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"\"The Secret Service isn't happy about this,\" President Barack Obama joked with eighth-grader Joey Hudy, of Phoenix, Ariz., as he convinced the kid to launch a m"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/green-tech/research-innovations/stories/marshmallows-and-serious-science-at-the-white-house>