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Hagel on Navy Yard shooting: 'Something went wrong'

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Hagel said that the investigations, which would be led by Deputy Defense Secretary Ash Carter, would examine physical security and access at U.S. military bases worldwide, and also the process for issuing security clearances, including those held by contractors. 

The Navy is also conducting a review of security procedures, Navy Secretary Ray Mabus said Tuesday.

A Navy official said that Aaron Alexis, the man who police say killed 12 at the Navy Yard Monday, received clearance for a Common Access Card that gave him access to the Navy Yard.

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