Khizr Khan, whose son was killed in Iraq, speaks directly to Donald Trump at the Democratic National Convention in Philadelphia on Thursday. His wife Ghazala Khan stands beside him. Robyn Beck/AFP/Getty Images hide caption

Meg Anderson
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Democratic Presidential candidate Hillary Clinton and Sen. Tim Kaine laugh at a campaign rally in Annandale, Virginia, on July 14. Saul Loeb/AFP/Getty Images hide caption
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Democratic vice presidential nominee Tim Kaine looks on during a campaign rally with democratic presidential nominee Hillary Clinton on July 30 in Pittsburgh. Justin Sullivan/Getty Images hide caption
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Indiana Gov. Mike Pence introduces Republican presidential candidate Donald Trump earlier this month. Aaron P. Bernstein/Getty Images hide caption
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Republican vice presidential nominee Mike Pence attends the Presidential Debate at Hofstra University on Sept. 26 in Hempstead, N.Y. Win McNamee/Getty Images hide caption
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A memorial is left on July 7 for Philando Castile, following his death by a police officer in Falcon Heights, Minn. Stephen Maturen/Getty Images hide caption
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At left, demonstrators hold signs outside a campaign event for Hillary Clinton in Columbus, Ohio, on Tuesday. Right: A Donald Trump hat burns during a protest near a Trump rally in San Jose, Calif., earlier this month. L: Ty Wright, R: Josh Edelson/L: Bloomberg via Getty Images; R: AFP/Getty Images hide caption
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Donald Trump holds a media conference announcing the establishment of Trump University on May 23, 2005, in New York City. Thos Robinson/Getty Images hide caption
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Where's The Color In Kids' Lit? Ask The Girl With 1,000 Books (And Counting)
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Jasper Barnett, a junior at Thomas Jefferson High School for Science and Technology in Alexandria, Va., looks up in the school's planetarium. Elissa Nadworny/NPR hide caption