Stranded in Yemen’s war zone, a decaying supertanker has more than a million barrels of oil aboard. If—or when—it explodes or sinks, thousands may die.

The country’s cyber forces have raked in billions of dollars for the regime by pulling off schemes ranging from A.T.M. heists to cryptocurrency thefts. Can they be stopped?

Three journeys from the past century—a rogue adventurer’s, my father’s, and mine—converged in the air.

Eira Thomas’s company has used radical new methods to find some of the biggest uncut gems in history.

A young Englishman got mixed up in a white-supremacist movement. Then he learned of a plot to kill a politician.

The U.K. is in a panic over voters’ decision to withdraw from the E.U. But the pugnacious millionaire whose donations—and Trumpian scare tactics—helped sway Britons has no regrets.