My grandfather was from a town in Missouri and told me a story that when he was a kid, his little town had the biggest factory in the world to make a certain it

My grandfather was from a town in Missouri and told me a story that when he was a kid, his little town had the biggest factory in the world to make a certain item. That item was stirrups and of course there aren't many horse riders and we don't need so many horse product factories. Today his town has no factories and there's basically no town left anymore, just an old building that was the schoolhouse.