Fort Myer and Fort Lesley J. McNair, both within two miles of the Pentagon, implement “full access control,” which means they increase the level of military police surveillance of those who enter them. Visitors are now required to register and sign in at a visitor center, and obtain a temporary pass. The measures, part of a security crackdown due to concerns about terrorism, will allow commanders to know who is entering their installations 24 hours a day and adjust their security measures immediately as needed. [MDW News Service, 8/3/2001; Washington Post, 8/15/2001] All other Army posts in the Washington, DC area are currently implementing similar access restrictions (see August 15, 2001).