LOUISVILLE, Ky. (FOX 56) — Craig Kaviar has been a blacksmith all of his adult life. His metal works are pieces of art, often displayed in galleries. His forge in Louisville is his happy place.

Blacksmiths were the high technologists of fabrication up until the industrial revolution gained momentum. At its core, this is the art and science of making any needed tool or mechanism out of metal.

In a dark, cavernous room near the Port of Oakland's massive cranes and shipping terminals, John Colle Rogers was bent over, sorting through a big box of old guns and gun parts, illuminated by a ...

For most of human industrial history, the blacksmith was the indispensable artisan. He could fashion almost anything needed, from a simple hand tool to a mechanism as complex as a rifle.