President Obama speaks in Ethiopia. While there, he noted that in the U.S., presidents can't run for more than two terms. But if they could, he said, he'd win. Mulugeta Ayene/AP hide caption

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Dana Bowerman's lifelong best friend Michelle Elliott holds a photograph of the two together. Bowerman is serving a nearly 20-year sentence for federal drug conspiracy charges. She was holding out hope for clemency for nonviolent drug offenders but it is unlikely that she will receive an early release date. Matthew Ozug/NPR hide caption

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Vice President Joe Biden addresses a progressive youth summit in Washington, D.C., earlier this month. Chip Somodevilla/Getty Images hide caption

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A supporter waves a Cuban flag in front of the country's embassy after it reopened for the first time in 54 years on July 20 in Washington, D.C. The embassy was closed in 1961 when U.S. President Dwight Eisenhower severed diplomatic ties with the island nation after Fidel Castro took power in a communist revolution. Mark Wilson/Getty Images hide caption

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An honor guard from the South Carolina Highway Patrol lowers the Confederate battle flag, removing it from the Capitol grounds on July 10. John Bazemore/AP hide caption

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High-profile events like bridge collapses or road sinkholes (like this one in Maryland in 2010) could make you think America's roads are crumbling. That's not quite true. Logan Mock-Bunting/Getty Images hide caption

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Secretary of State Hillary Clinton testifies in January 2013 before the Senate Foreign Relations Committee on the attack on the U.S. mission in Benghazi, Libya. Mandel Ngan/AFP/Getty Images hide caption

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A label on a bag of popcorn indicates it is a non-GMO food. House Republicans on Thursday voted in favor of a law that would block states from mandating GMO labels. Robyn Beck/AFP/Getty Images hide caption

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A man in Nairobi, Kenya, stands in front of a mural of President Obama, created by the Kenyan graffiti artist Bankslave, ahead of Obama's trip to Kenya and Ethiopia. Ben Curtis/AP hide caption

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Ben Carson is the only African-American major candidate running for president in 2016. He grew up poor in Detroit in the 1960s and paved his own path. Jonathan Bachman/AP hide caption

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In a campaign video, Rand Paul uses a chainsaw to shred 1,700 pages of what he says represents the federal tax code. Paul is offering a flat-tax plan that fits on one page. Rand Paul campaign video hide caption

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After a long day, Emeka arrives home to the apartment in South Tulsa that he shares with his father. Kenneth M. Ruggiano for NPR hide caption

itoggle caption Kenneth M. Ruggiano for NPR