Much of the focus is on the 2.5 million individuals who currently hold active security clearances

Six months after a mentally deranged gunman killed 12 people at the Washington Navy Yard, Defense Secretary Chuck Hagel on Tuesday announced what his department will do to “close troubling gaps” in DOD’s ability to prevent a government employee, a member of the military, or a contractor from inflicting harm on other Defense Department employees.

Hagel said the Defense Department will begin to continuously evaluate people with security clearances, setting up “automated reviews” that will continuously pull information from law enforcement and other government databases.