I grew up in the town of Thornton, Illinois, a suburb just south of Chicago. With a population of 3,700, we knew almost everyone in our town. We didn't have much of a downtown - just a small grocery store, a pharmacist, a filling station, and our favorite hot dog stand. What Thornton did have was one of the world's largest limestone quarries. In fact, I remember owning a t-shirt, printed in the 1970s, that boasted of this distinction. It read: Thornton Home of the World's Largest Limestone Quarry (and on the back) Drop In Sometime... Today I learned that the huge cement/stone chute that overlooked one of the main roads is being torn down. It made me think of how integral the quarry was to my childhood. It was a part of the landscape...the backdrop for our lives. If you lived in Thornton, you were used to dust. Lots and lots of dust. The fine gray dust from the quarry was aggravating to housewives who struggled to keep surfaces clean and polished....