 Where do you get enough of them, let's say, to build many gas bags, each of which is 10 stories high? Well, you have to kill half a million cattle in Argentina, which is where they came from. They literally, you take the cecum, the piece of the intestine, and it comes out of kind of a square about the size of a handkerchief, and then you glue it to other ones, and then you glue some very thin cotton batting on the back of it,