U.S. Attorney General Eric Holder, shown speaking at the Congressional Black Caucus legislative conference on Friday, will be stepping down from his position as soon as a replacement is appointed. T.J. Kirkpatrick/Getty Images hide caption

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American Joshua Fattal was released in 2011 from Iran after the Sultan of Oman paid more than $400,000 in ransom. He now says the U.S. should bail its citizens out abroad. Mohammed Mahjoub/AFP/Getty Images hide caption

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Sen. Ted Cruz, R-Texas (center left) is a Tea Party favorite, whom observers count as a possible 2016 presidential candidate. He voted against President Obama's plan to fight the Islamic State. J. Scott Applewhite/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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Vice President Joe Biden hugs Ruth Glenn, of the National Coalition Against Domestic Violence, at a commemoration of the 20th Anniversary of the Act. Glenn says that as a victim in 1992, there was no place to turn. Susan Walsh/AP hide caption

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Millions watched President Obama's prime-time address this week, like these patrons of a San Francisco nail salon. But whether Americans will support his plan remains unclear. Justin Sullivan/Getty Images hide caption

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Republican Gov. Sam Brownback (left) listens while his Democratic challenger Paul Davis answers a question during their first debate at the Kansas State Fair. Charlie Riedel/AP hide caption

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House Speaker John Boehner, R-Ohio, on Capitol Hill on Thursday. Boehner says Congress stands ready to work with the president on the threat from Islamic State militants. J. Scott Applewhite/AP hide caption

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Police fire tear gas from an armored personnel carrier on Aug. 18 in Ferguson, Mo. The U.S. Senate is holding a hearing on the use of military-grade equipment by local police departments. Jeff Roberson/AP hide caption

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Former Virginia Gov. Bob McDonnell leaves the U.S. District Court for the Eastern District of Virginia with his son Bobby (right) on Thursday in Richmond, Va. McDonnell was found guilty on 11 of 14 charges related to taking gifts from a businessman in exchange for political favors. His wife, Maureen, was found guilty on nine of 14 charges. Alex Wong/Getty hide caption

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