Mike Ruppert - CIA and Drug Running (1997)
If you want to get to the roots of today's immigation question you can do a whole lot worse than go back to the work of Mike Ruppert whose career started as a whistleblower on CIA drug running.
The "War on Drugs" in Central America is central to the whole story on illegal immigration.
If you are short on time there is this – which covers the story of Gary Webb. Mike Ruppert was adamant that Webb committed suicide and was not murdered.