Salt mines used to protect old movies, TV film

Last fall I wrote a couple of columns on my visit to the Hutchinson Salt Mine at the south edge of Hutchinson. Those columns told you how the salt was formed and how deep the mine is but I didn’t tell you about the unique storage they have there. Why are millions of reels, data tapes, and boxes in a Kansas salt mine? Think “Fort Knox” - miles from disaster, 650 feet below the surface, within…