What is it like to be an undercover agent busting some of the most infamous global drug dealers? And do undercover agents for the DEA ever run up against opposition from other U.S. agencies like the CIA? It turns out they do! Career veteran of the United States Drug Enforcement Administration, Mark Levine joins John Kiriakou on this episode of The Whistleblowers to discuss the job of taking down drug kingpins and how he exposed the CIA for trying to stop him.