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Police have one and then I have to find everything together. So, I've got to go from the center to my station ground and from my station ground to the safety ground. Somebody did a really good job the other day with a, they had some kind of a meter or whatever that was made for measuring ground. And they went around and showed the difference in potential for each ground rod and then showed the difference afterwards after they put them all together. It was pretty convincing. It's a big piece of it, but it's really interesting. And it showed the reason why you do that.