In the autumn of 1982, a wave of fear swept through the US after seven people in the Chicago area died suddenly. The victims, ranging from a 12-year-old girl to a 35-year-old flight attendant, had all taken Extra Strength Tylenol capsules that had been laced with potassium cyanide.
The poisonings, seemingly random and without a clear motive, triggered a nationwide panic, leading to a mass recall of the painkiller and the introduction of tamper-proof packaging that is still in use today.
