In the Hall of Remembrance at the U.S. Holocaust Memorial Museum, visitors can light candles in memory of the 6 million Jews killed by the Nazis and their collaborators during World War II. Nicholas Kamm /AFP/Getty Images hide caption

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A phonorecord by Alexander Graham Bell, one of the Smithsonian's trove of recordings left there by the inventor of the telephone. Richard Strauss/Smithsonian's National Museum of American History Via AP hide caption

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The term "third coast" refers to American cities that sit on the Great Lakes shoreline, like Chicago. Jeff Haynes/AFP/Getty Images hide caption

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A barista serves coffee at a cafe in Naples, Italy. The Italian city's long-standing tradition of buying a cup for a less-fortunate stranger is now spreading across Europe. Christopher Furlong/Getty Images hide caption

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People line up to enter the U.S. Supreme Court on Tuesday. All of the court's archived audio, dating back to 1955, has now been digitized for public access online. Mark Wilson/Getty Images hide caption

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