For over two decades, Barry Seal, aka Ellis MacKenzie, was a prolific  drug smuggler, working for many notable cartels, the biggest and best  known being Pablo Escobar's Medellin Cartel. He was also an inside man  with the CIA and DEA for most of his criminal activities, and many even  link him to being the second man in the assassination of JFK by his  flight school buddy, Lee Harvey Oswald. Give it a listen and tell us  what you think in the comments below.