Sens. John McCain, R-Ariz., (left) and Jack Reed, D-R.I., hear testimony on operations against ISIS from Gen. Lloyd Austin. Pablo Martinez Monsivais/AP hide caption

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Dream Action Coalition Co-director Cesar Vargas, at a news conference on Capitol Hill in 2014. He wants immigrants who were brought to the U.S. illegally as children to later be allowed to serve in the military. AP hide caption

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A view inside the Washington National Guard Army Aviation Support Facility on Joint Base Lewis-McChord in February. As Congress cuts $500 billion from the Defense Department budget, the National Guard and active Army are competing for the same dollars. Patricia Murphy/KUOW hide caption

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Displaced people from the minority Yazidi sect walk toward the Syrian border on the outskirts of Sinjar mountain on Monday. A U.S. assessment team says far fewer refugees are stranded on Mount Sinjar than previously thought. Reuters/Landov hide caption

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GOP leadership decided against keeping an immigration-related provision in the defense authorization bill. But it allowed one banning the Defense Department from participating in climate change research. Carolyn Kaster/AP hide caption

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Defense Secretary Chuck Hagel briefs reporters at the Pentagon on Monday. Hagel and President Obama will need to fight through a wall of resistance to their proposed defense budget cuts, say former members of a defense base closing commission. Carolyn Kaster/AP hide caption

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A photo provided by Lockheed Martin shows a test of its THAAD missile interceptor system. The Pentagon has awarded a contract worth more than $3.9 billion for the system. Lockheed Martin hide caption

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