The New York Times > National > 9/11 Panel Calls Policies on Immigration Ineffective:
"The commission investigating the 9/11 attacks has concluded that immigration policies promoted as essential to keeping the country safe from future attacks have been largely ineffective, producing little, if any, information leading to the identification or apprehension of terrorists."

http://www.nytimes.com/2004/04/17/national/17IMMI.html?pagewanted=all&position=