Heightened security will be in place at the Presidio of Monterey beginning today. Both visitors and employees will be subject to the new measures. Individuals without a Department of Defense ID will now have to pass a criminal background check before entering. Visitors who are not escorted by a DOD ID holder will also be subject to a background check and must get a visitor’s pass. The changes are in response to the shootings at the Navy Yard and Fort Hood.