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Originally Posted by 4X4
I think I heard the morning host on QR talking about this the other day, but I missed half of it. Is it the one where they were boring a tunnel just 3' above a different tube line? If so, what was this show called? What network was it on?
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I believe it was a PBS Nova episode, if its the same one I saw. I don't see it airing again soon in my guide.