Secretary of State Rex Tillerson (from left), Mexican Foreign Minister Luis Videgaray and Mexican Interior Minister Miguel Angel Osorio Chong greet each other during a news conference in Mexico City on Thursday. Ronaldo Schemidt/AFP/Getty Images hide caption

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White House Chief of Staff Reince Priebus (center) speaks onstage at CPAC in National Harbor, Md., with White House adviser Steve Bannon (left) and American Conservative Union Chairman Matt Schlapp on Thursday. Mike Theiler/AFP/Getty Images hide caption

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Gavin Grimm speaks during an interview at his home in Gloucester, Va., in 2015. Grimm sued his school district for the right to use the boys' bathroom; the case is scheduled to be argued before the Supreme Court next month. Steve Helber/AP hide caption

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Former Rep. Gabrielle Giffords says lawmakers should "have some courage" and face their constituents at town halls, despite protests. Spencer Platt/Getty Images hide caption

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Homeland Security chief John Kelly (from left), Secretary of State Rex Tillerson, Mexican Foreign Minister Luis Videgaray and Mexican Interior Minister Miguel Angel Osorio Chong spoke with reporters after initial meetings in Mexico City Thursday. Ronaldo Schemidt/AFP/Getty Images hide caption

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Russian President Vladimir Putin and Defense Minister Sergei Shoigu (far right) attend a wreath-laying ceremony at the Tomb of the Unknown Soldier in Moscow on Thursday. Shoigu announced the use of 162 Russian weapons in Syria on the eve of the Defenders of the Fatherland national holiday, celebrated in Russia on Thursday in honor of the nation's military. Mikhail Klimentyev/Sputnik, Kremlin Pool Photo via AP hide caption

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Mikhail Klimentyev/Sputnik, Kremlin Pool Photo via AP

Russian Defense Minister Says His Military Has Tested 162 Weapons In Syria

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Education Secretary Betsy DeVos addresses the Conservative Political Action Conference at the Gaylord National Resort and Convention Center Thursday at National Harbor, Md. Chip Somodevilla/Getty Images hide caption

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Iraqi forces gather at Mosul's airport during an offensive to retake the western side of the city from ISIS Thursday. Government forces reportedly entered the airport on the southern edge of the city for the first time since 2014. Ahmad Al-Rubaye/AFP/Getty Images hide caption

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Arkansas state Sen. Bart Hester, defends his bill preventing local governments from passing their own anti-discrimination laws. On Thursday, a Fayetteville law was struck down by the state Supreme Court. Danny Johnston/AP hide caption

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Sen. John McCain, R-Ariz., speaks during the Munich Security Conference last week. McCain's office has confirmed that while he was overseas, he met with U.S. forces in Syria about defeating ISIS. Matthias Schrader/AP hide caption

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Matthias Schrader/AP

Scientists rallied for evidence-based public policy outside the American Geophysical Union's fall meeting in San Francisco in December. Marcio Jose Sanchez/AP hide caption

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Marcio Jose Sanchez/AP

Should Scientists March? U.S. Researchers Still Debating Pros And Cons

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The one thing that's certain is that there will be changes in the Affordable Care Act. Joe Raedle/Getty Images hide caption

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What's Next For The Affordable Care Act? Your Questions Answered

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A typical meal in the Democratic Republic of Congo consists of greens, fufu - a starchy ball made from cassava flour - and meat, such as freshwater fish. Amy Maxmen for NPR hide caption

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U.S. Immigration and Customs Enforcement arrested 680 people during the first week of February. The memos call for 10,000 more ICE officers and agents as well as 5,000 more agents at U.S. Customs and Border Protection. Bryan Cox/ICE via AP hide caption

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Bryan Cox/ICE via AP