Despite those past incidents and his recent history of mental illness, he still maintained the low-level security clearance he received during his four-year naval service, which ended in 2011.
His security clearance led to his hiring as an information technology specialist by a private defense contractor. The contractor said Alexis worked on at least six military installations in July and August without incident.
Monday’s incident is the latest in a rash of deadly mass shootings in the United States. During an interview on the Spanish-speaking television network Telemundo, President Barack Obama called for Congress to approve new gun control measures to keep guns out of the hands of the mentally ill.
Obama has ordered a review of security standards for government contractors and employees across federal agencies, and Defense Secretary Chuck Hagel has ordered a security review of all U.S. military facilities around the world.
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