Nu vet jag inte direkt troligheten om detta, men kan vara intressant att tillägga. Detta stod i varje fall på wikipedia:
Citat:
On October 26, 2002, Russian special forces used a chemical agent (presumably KOLOKOL-1, an aerosolized fentanyl derivative), as a precursor to an assault on Chechen terrorists, ending the Moscow theater hostage crisis. All 42 of the terrorists and 120 of the hostages were killed during the raid; all but one hostage, who was killed, died from the effects of the agent.