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Jay Dolph checks his harness before rappelling a 50-foot rock face at Capen Park on November 7, 2009.Jay Dolph, right, helps Zhenyu Wang prepare to rappell a rock face in Capen Park on November 7, 2009.Matthew Hodges, left, and Kirsten Alvey share a laugh as other members of the Chouteau Grotto spelunking club rappell a rock face at Capen Park on November 7, 2009.Zhenyu Wang, right, celebrates his first ever rappell drop with a photo with Jay Dolph, at Capen Park on November 7, 2009.Kirsten Alvey, Zhenyu Wang, BJ Sidell, Matthew Hodges, and Derek Carson (left to right) watch as Jay Dolph demonstrates safety procedures before rappelling a cliff at Capen Park on November 7, 2009.