A dangerous drug called fentanyl is turning the worst drug epidemic in U.S. history even deadlier. Fusion correspondent Mariana van Zeller tracks down the drug’s two sources: pharmaceutical companies and Mexican drug lords.

An investigation into web pages, which publish online police photos and charge money to eliminate them, reveals who is behind these operations.

Correspondent Mariana van Zeller gets up close and personal with extremists on all sides, to see how otherwise open-minded people are finding purpose in hatred and how that hatred is infecting even mainstream politics.

What do illegal arms traffickers, human traffickers, terrorists and some billionaires have in common? They all have to hide their money. Fusion uncovers the dark world of the owners of these secrets.