Diana, Princess of Wales, died twenty years ago this month. Her surprisingly slight FBI file, released via the Bureau’s FOIA reading room, covers two separate investigations into possible threats against her life. It includes someone “sarcastically” claiming they mailed her and Charles a bomb as a wedding present.

February, 1981. In a smoky bar in Alexandria, Virginia, an FBI informant just happens to overhear a conversation that could change the course of the free world: a plot to assassinate Prime Minister Margaret Thatcher. If that sounds a bit too contrived to be true, well, that might explain why the Bureau couldn’t find any evidence that it was.