SuperPAC NextGen Climate Action aired a 60-second ad about Iowa Republican Senate candidate Joni Ernst featuring two rich guys with a briefcase full of cash. YouTube hide caption

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Iranian Foreign Minister Mohammad Javad Zarif speaks during a recent news conference in Rome. Zarif told NPR that the U.S. has been hesitant and contradictory in its approach to dealing with the self-declared Islamic State. Fabio Campana/EPA/Landov hide caption

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House Speaker John Boehner has expressed cautious support for the White House plan. He and other House GOP leaders are backing a measure to authorize the arming and training of moderate Syrian rebels. J. Scott Applewhite/AP hide caption

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Defense Secretary Chuck Hagel, left, and Gen. Martin Dempsey, chairman of the Joint Chiefs of Staff, defend the president's strategy before the Senate Armed Services Committee. J. Scott Applewhite/AP hide caption

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President Obama spoke Tuesday about the U.S. plan to fight the Ebola epidemic in West Africa, speaking at the Centers for Disease Control and Prevention. The White House plan reportedly includes deploying 3,000 U.S. military personnel and training health care providers in Liberia. Mandel Ngan/AFP/Getty Images hide caption

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Members of the anti-war activist group CodePink interrupt a Senate Armed Services Committee hearing with Defense Secretary Chuck Hagel (left) and Gen. Martin Dempsey, chairman of the Joint Chiefs of Staff. J. Scott Applewhite/AP hide caption

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The Saltire, the flag of Scotland, flies near the Union Jack in Gretna in Scotland. Some economists say Thursday's vote on Scotland's independence could have wide-ranging economic impacts. Andy Buchanan/AFP/Getty Images hide caption

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President Obama addresses the nation from the Cross Hall in the White House on Sept. 10. Obama ordered the United States into a broad military campaign to degrade and ultimately destroy militants in two volatile Middle East nations, authorizing airstrikes inside Syria for the first time, as well as an expansion of strikes in Iraq. Saul Loeb/AP hide caption

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Workers unload medical supplies to fight the Ebola epidemic from a USAID cargo flight in Harbel, Liberia, in August. John Moore/Getty Images hide caption

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Former Secretary of State Hillary Clinton, former President Bill Clinton and U.S. Sen. Tom Harkin work the grill during Harkin's annual fundraising steak fry in Indianola, Iowa, on Sunday. Charlie Neibergall/AP hide caption

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