International ships call at the busy Port of New Orleans. It's a major shipping convergence point on the Mississippi River. Ships come upriver from the Gulf of Mexico with imports from abroad, and barges come downriver, bringing U.S. goods for export. Debbie Elliott/NPR hide caption

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The NRA and some concealed-carry activists say the best defense against gun violence is armed "good guys." Here, a man fires his pistol at an indoor range in Aurora, Colo., last summer. Alex Brandon/AP hide caption

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PepsiCo's product line ranges from salty chips and its sugary namesake drink to more healthful fare like hummus and yogurt. In 2010, the company announced plans to cut sugar, fat and sodium in its products to address health and nutrition concerns. Joe Raedle/Getty Images hide caption

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Two camels fight during the Camel Wrestling Championship in the town of Selcuk, near the western coastal city of Ismir, Turkey, on Jan. 15, 2012. It's the biggest event of the camel-wrestling season in Turkey. Tolga Bozoglu/EPA /Landov hide caption

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Vice President Joe Biden participates in a round-table discussion on gun violence at Virginia Commonwealth University with Sen. Tim Kaine, D-Va., on Friday. The panelists included people who worked on gun safety after the 2007 Virginia Tech shooting. Steve Helber/AP hide caption

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Sarah Collins Rudolph was with her sister Addie Mae Collins when a bomb exploded in the 16th Street Baptist Church in Birmingham, Ala. The 1963 bombing killed her sister and three other girls, and Collins Rudolph was seriously injured in the attack. Frank Couch/AL.COM /Landov hide caption

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A New York City police academy graduation ceremony on Dec. 28, 2012, where Mayor Michael Bloomberg announced that the New York murder rate has hit an all-time low. While some point to the NYPD's policing tactics to explain the decline, others say economic and demographic shifts are also at work. Seth Wenig/AP hide caption

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People walk past a closed business affected by Hurricane Sandy in the heavily damaged South Street Seaport in New York City in December. Spencer Platt/Getty Images hide caption

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Forty years after Roe v. Wade --€” and nearly 50 years after the start of efforts toward legalizing abortion €-- the debate still carries on, with younger generations ready to take up the cause for both sides. Mark Wilson/Getty Images hide caption

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The Big Sandy Power Plant, 4 miles north of Louisa, is the biggest industry in Lawrence County. Local residents blame President Obama's environmental policies for the company's plans to close the plant in 2015. Noah Adams/NPR hide caption

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Menu for Lincoln's 2nd inaugural ball, March 6, 1865 Smithsonian Institution hide caption

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Barack Obama takes the oath of office beside his wife Michelle and daughters Sasha, right, and Malia, at the U.S. Capitol in Washington on Jan. 20, 2009. Chuck Kennedy/AP hide caption

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New education standards place more emphasis on nonfiction reading and writing over fiction works. Some say this could lead students away from a passionate engagement with literature. Chris Sadowski /iStockphoto hide caption

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Hannah and Marty eat watermelon snacks at the Save the Chimps sanctuary. Save the Chimps hide caption

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