Aaron Alexis,34, is the contractor the FBI has identified as a suspect in the mass shooting at the Washington Navy Yard Sept. 16, 2013.
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The Washington Navy Yard shooting has prompted a global review of security at U.S. military bases. The attack in Benghazi prompted a global review of security at U.S. diplomatic posts.
Expert: Truck bombs and conspiracies are easier to stop; lone wolfs harder
While significant details about the mass shooting at the Washington Navy Yard on Monday remain obscure, as with every such incident, the first question that people want answered is this: Could something have been done to save those innocent lives?