Stateline.org: “The 2001 terrorist attacks led every state but South Dakota to restrict access to information deemed critical to homeland security — from architectural blueprints to emergency evacuation routes, according to a comprehensive, state-by-state study of post-9/11 changes to open-government laws. Wary of terrorists, state lawmakers closed government meetings previously open to the public, denied residents access to disaster-response plans and concealed documents on mass-transit systems, energy companies and research laboratories, according to the findings.”