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DENVER (KCNC-TV) — More than 160 people overcame their fear of heights to support people facing a much scarier challenge. Volunteers went “Over The Edge” and rappelled 38 stories down the side of the Hyatt Regency in downtown Denver.

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The event raised money for the Cancer League of Colorado.

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One of those volunteers is a 90-year-old World War II and Korean War veteran. Richard Keller isn’t letting prostate cancer slow him down.

“That building is something. You have a throttle and a brake and your hands. They all have to be working in coordination. It was kind of tricky to get it just right so I could keep going rather than catch every few seconds,” he said. “It’s a wonderful thing to try. I encourage everybody to try it at least once in life.”

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Keller says he looks forward to doing it again next year.