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DENVER (CBS) – A 90-year-old World War II veteran has had plenty of life experiences. And last weekend, he added another!

Richard Keller reached new heights on Saturday when he rappelled down a 38-story skyscraper in Downtown Denver.

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90-Year-Old World War II Vet Rappels Down Skyscraper To Raise Money For Cancer Research

Credit: CBS3

He says he did it to raise money for cancer research. Keller says it took some daring, but he says he’s always ready for a challenge.

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“You have a throttle and a break, and your hands…they have to be working in coordination which was kind of tricky to get it just right so I could keep going,” said Keller. “It’s a wonderful thing to try.”

Richard Keller

Credit: CBS3

About 160 people joined Keller at the skyscraper last weekend.

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And even though he’s 90, he won no less than 22 gold medals at last summer’s senior games.