Actually, I think it did happen

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"Parliamentary Under Secretary of State for Public Health Caroline Flint informed Mr Lamb of the investigation, adding: "I am advised that it is unlikely the zinc cadmium sulphide dispersion trials have resulted in any long term health effects.""

"A small quantity of cadmium was sprayed over parts of the city as part of a Ministry of Defence experiment on chemical dispersal.

The Ministry of Defence said the experiment, which its scientists say was safe, was to "simulate the airborne dissemination" of biological warfare agents in the air."

Posted By: BerlinCanary, Oct 22, 14:40:35