This is from the Council of Foreign Relations: Building a North American Community, published in 2005 and full of "security measures" against terrorists etc. PDF, that downloads fairly quickly on dial up.

http://www.cfr.org/content/publications/attachments/NorthAmerica_TF_final.pdf

This site is not being updated much of late but has a lot of links related to the issues of illegal immigration across our borders and the like, leading to loss of sovereignty of the United States as a country.

http://www.theamericanresistance.com/sovereignty/sovereignty.html

http://www.theamericanresistance.com/index.html