David, you made some excellent points about Colon Cancer. I hope a lot of people get screened. My husband has been battling the disease since 2005. He had no symptoms- it was caught as a routine physical, his first ever colonoscopy. Ron had to have a colon resection, hernia repair, and lung surgery. I have a  cancer blog at http://ronsroad2recovery.blogspot.com and write about a variety of topics.