By the 1980s, Outlaw Motorcycle Clubs had been deemed “organized crime on wheels” by federal agencies. This was the world that Frank D’alesio entered as a rookie ATF agent, when he began the string of undercover operations that would define his career. Investigating the most notorious motorcycle clubs, Frank’s undercover work pulled him deep into a world of brutal traditions, tested loyalties and illegal arms dealing—and ended with him at the head of his very own illegal motorcycle gang. Join Mariana deeper into the underground, and don’t miss the TV series Trafficked With Mariana van Zeller Wednesday on National Geographic and streaming on Hulu.