Some interesting articles here:
Al-Zarqawis Rise to Power: Analyzing Tactics and Targets
http://www.jamestown.org/terrorism/news/article.php?articleid=2369831
Terrorism and Human Smuggling Rings in South and Central America
http://www.jamestown.org/terrorism/news/article.php?articleid=2369832
This site seems to have a lot of these type of articles:
http://www.jamestown.org/
Yep, that's a good site and thanks Fair Opinion for the links.