I think we still have some chemical weapons in Pueblo, Colorado. They are in the process of destroying them, but I don’t think they’re all gone yet.
Used to be stored at Dugaway Proving Grounds. Most met the incinerator at Anniston.
No one in the Military shed many tears over having to destroy the chem weapons. The thing about chems (and bio systems) is that they’re so dang *easy* to make. We threw away the product, not the recipe.