Quite a few years ago I was visting my cousin in Portland, Maine, and one time when we were driving around he pulled into an industrial parking lot, which turned out to be that of a chain manufacturer. There was a small window in the side of the building where you could look in and see a machine automatically heating, forming, and welding chain links together. Except for that pretty vague memory I can't give any detail, except that it seemed to be done pretty much without human intervention.
Try to make a living, not a killing. -- Utah Phillips
Don't believe everything you know. -- Bumper sticker
Everybody is ignorant, only on different subjects. -- Will Rogers
Law of Logical Argument - Anything is possible if you don't know what you are talking about.