As anybody who partied in the 1980s can tell you, cocaine's heyday has already come and gone.

And yet, America remains the biggest consumer of cocaine — not to mention a slew of other drugs from heroin to marijuana— worldwide.

Most people could point to stories of Pablo Escobar and assume that all cocaine comes straight from Colombia. But that simply isn't the case any longer. The drug trade is spreading to other countries, and leaving dead bodies and billions of dollars in its wake.

Where does America's cocaine come from? And how does it get from the coca leaf in South America to the clubs of Miami?