Thousands of emergency responders, military personnel and volunteers across ten counties took part in a mock chemical leak from the Blue Grass Army Depot on Wednesday.
It's an annual drill put on by the military, the Depot and local Emergency Management Offices.
Decontamination stations were setup at parks and hospitals across central Kentucky so local Hazmat teams could practice washing down victims who would come in contact with a nerve agent.
Officials say such a disaster is very unlikely, and add it would have to be a strong, concentrated amount of the gas to become lethal to a large population.
The military says they expect the depot to destroy its 523 tons of chemical munitions by 2021.