Mystery solved? 8" steel pipe in the way of Seattle tunnel machine

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In this photo made with a fish-eye wide-angle lens, "Bertha," the massive tunnel boring machine that is expected to spend the next 14 months drilling a two-mile tunnel to replace the 60-year-old Alaskan Way Viaduct, is shown ready to begin drilling later this month, Saturday, July 20, 2013 in Seattle. (AP Photo/Ted S. Warren)