mystery object

(Photo credit MANAN VATSYAYANA/AFP/Getty Images)

Object Blocking ‘Big Bertha’ Still A Mystery

The $80 million machine is designed to break up boulders, so what it hit is a mystery. It may be a huge boulder left by the last ice age. Others think it could be a buried rail car from pioneer days when the area was filled in.

CBS Seattle–12/11/2013

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