Stockholm syndrome isn't a diagnosis—so why do we still treat it as one?

Fifty-three years ago, convicted criminal Jan-Erik Olsson walked into a bank on Norrmalmstorg, a square in central Stockholm, pulled a submachine gun from under his jacket and fired at the ceiling. Concrete and glass rained down. "The party has just begun!" he shouted in a fake American accent before taking four bank employees hostage.

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