Pentagon

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FILE - In this Feb. 24, 2014 file photo, Defense Secretary Chuck Hagel briefs reporters at the Pentagon. President Barack Obama has ordered the Pentagon to plan for a full American withdrawal from Afghanistan by the end of this year should the Afghan government refuse to sign a security agreement with the US the White House said Tuesday. (AP Photo/Carolyn Kaster, File)

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Defense Secretary Chuck Hagel arrives to brief reporters at the Pentagon, Monday, Feb. 24, 2014, where he recommended shrinking the Army to its smallest size since the buildup to U.S. involvement in World War II in an effort to balance postwar defense needs with budget realities. (AP Photo/Carolyn Kaster)

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Joint Chiefs Chairman Gen. Martin Dempsey listens as Defense Secretary Chuck Hagel briefs reporters at the Pentagon, Monday, Feb. 24, 2014, where he recommended shrinking the Army to its smallest size since the buildup to U.S. involvement in World War II in an effort to balance postwar defense needs with budget realities. (AP Photo/Carolyn Kaster)

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Defense Secretary Chuck Hagel briefs reporters at the Pentagon, Monday, Feb. 24, 2014, where he recommended shrinking the Army to its smallest size since the buildup to U.S. involvement in World War II in an effort to balance postwar defense needs with budget realities. (AP Photo/Carolyn Kaster)

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Joint Chiefs Chairman Gen. Martin Dempsey follows Defense Secretary Chuck Hagel after a news conference at the Pentagon, Monday, Feb. 24, 2014, where Hagel recommended shrinking the Army to its smallest size since the buildup to U.S. involvement in World War II in an effort to balance postwar defense needs with budget realities. (AP Photo/Carolyn Kaster)

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Joint Chiefs Chairman Gen. Martin Dempsey listens at left as Defense Secretary Chuck Hagel briefs reporters at the Pentagon, Monday, Feb. 24, 2014, where he recommended shrinking the Army to its smallest size since the buildup to U.S. involvement in World War II in an effort to balance postwar defense needs with budget realities. (AP Photo/Carolyn Kaster)

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Defense Secretary Chuck Hagel briefs reporters at the Pentagon, Monday, Feb. 24, 2014, where he recommended shrinking the Army to its smallest size since the buildup to U.S. involvement in World War II in an effort to balance postwar defense needs with budget realities. (AP Photo/Carolyn Kaster)