Thanks for the link artbrooks. So, to return the favor, here is a link to an article from 1998, from the Dallas Morning News, which explains some of it. Paul Wellstone had gone on a fact finding trip to South America not long before he was killed.

http://www.colombiasupport.net/199808/0898covert.html

The two hot spots these days are Columbia and Venezuela. You can also find information on US covert operations in Latin America here:

Resource Center for the Americas

There is a good article on it here:

Training Human Rights Violators

Here is another:

Outsourcing Human Rights Violations