The cocaine trade of the 70s and 80s had an indelible impact on Miami turning the once sleepy retirement community into one of the world's most glamorous and nefarious cities. In "Cocaine Cowboys" we hear from some of the dealers, killers et al about the effect Colombia's Medellin cartel's $20 billion business had on the city. In particular we hear about Griselda Blanco, the Godmother of the business, a vicious psychopath whose feats helped turn Miami into the murder capital of North America.