Indiana: Chicken egg production. A man grabbing a drawer full of chicks, same worker pulling them out and feeding them into boxes, worker pulling them out of hen house, putting hens in boxes and loading them onto trucks. An abandoned limestone mine. Home to an underground chicken farm. It is naturally air-conditioned so lay eggs year-round. More shots: blowers bring in other cooler air, worker putting in more food for hens and a worker taking eggs out from under hens.