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Chad Qian, 14, is the 2012 Raytheon MATHCOUNTS National Competition champion.
Watch a video about an original letter written by President George Washington, now on display in the Public Vaults of the National Archives, in Washington, D.C.
The National Disaster Search Dog Foundation turns rescued dogs into rescuers.
Watch TIME's Deputy Managing Editor Nancy Gibbs answer 5 questions about covering presidential elections
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