Over 1400 so-called dark fleet ships from Venezuela, Iran and Russia have been sanctioned or blacklisted by Western countries in recent years, with little impact until the current ramp up in U.S. enforcement. WSJ’s Shelby Holliday breaks down how these tankers evade scrutiny, and the Trump administration’s efforts to disrupt this billion-dollar business. Chapters: 0:00 Black-market oil 0:25 How the dark fleet operates and stays hidden 3:03 The U.S. crackdown 5:12 The end of the dark fleet? News