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Colorado School of Mines mining engineering students Kelly Michals, cq, left, and Josh Gresham, cq, right, work in an old Army mine that is now used for instruction near Idaho Springs Wednesday February 1, 2006. (BARRY GUTIERREZ/ROCKY MOUNTAIN NEWS) CQ:

Colorado School of Mines mining engineering students Kelly Michals, cq, left, and Josh Gresham, cq, right, work in an old Army mine that is now used for instruction near Idaho Springs Wednesday February 1, 2006.  (BARRY GUTIERREZ/ROCKY MOUNTAIN NEWS) CQ: