A visitor at the main gate of the Washington Navy Yard is stopped to have his identification checked in Washington, September 17, 2013. Stunned Washington authorities questioned on Tuesday how a U.S. ... more 
A visitor at the main gate of the Washington Navy Yard is stopped to have his identification checked in Washington, September 17, 2013. Stunned Washington authorities questioned on Tuesday how a U.S. military veteran with a record of brushes with the law could get clearance to enter a Navy Base where he killed 12 people before police shot him dead. REUTERS/Jason Reed (UNITED STATES - Tags: CRIME LAW MILITARY) less 
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Reuters | Photo By JASON REED / REUTERS
Tue, Sep 17, 2013 1:49 PM EDT