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.
Senators call for review of security clearance process
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.
Lawmakers say this most recent incident shows serious flaws in the federal government's process for issuing security clearances and vetting contractors - an issue laid bare earlier this year by former National Security Agency contractor turned whistle-blower Edward Snowden.
Democratic Senators Claire McCaskill and Jon Tester plan to send a letter to the Office of Personnel Management's inspector general, demanding answers about how Alexis' background check was conducted for his security clearance.
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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.