I live in Turkey,and you can easily buy %20-25 nitric acid as lime dissolver. I still don't understand why they ban nitric acid in USA etc. The terrorists or so probably won't buy nitric acid from hardware stores. They've got a lot of channels and banning nitric acid does not change anything. Also,if they ban nitric acid they should also ban bleach,cos you can easily make potassium chlorate from bleach.