Call for Navy security review
US politicians are calling for a review into how the suspected gunman in Monday's rampage at the Washington Navy Yard received and maintained a security clearance, despite a history of violent episodes.
Navy yard gunman was treated by US for 'hearing voices'
The navy yard gunman who died after killing 12 people in Washington DC yesterday was previously treated by US medical authorities for serious mental illness and the 'hearing of voices'.
Aaron Alexis died in a gun battle with police during the rampage at Washington Navy Yard.
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Security clearance questions over Washington gunman
Despite having serious mental health problems and previous incidents with firearms, Aaron Alexis held security clearance for the Navy base.
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FBI probes fatal shooting at Washington Navy shipyard
At least 13 people, including the suspected gunman, have been killed in a shooting at a Navy base in Washington DC.