15 years ago doctors told me I needed knee-replacement surgery. I said I’d wait for technology to figure out how to save my knee.  Earlier this year, I was told that my knee had to be replaced as soon as possible and that any other options wouldn’t work, or, at  best, would be a short-term fix. I took my chances and in July had cartilage implanted in my knee. Climbing the last of the stairs Today, less than 6 months later, I climbed Mount Masada in Israel at ...