marc siegel, professor of medicine at nyu's lango langone medical center. good to see you both, docs. >> talking about health, this month is colon cancer awareness month. did you know that colon cancer is the second leading cause of cancer deaths in the united states, but if it's detected early and screened for properly, you know it's also one of the most treatable. dr. samadi, this really hits home for me because my father died of colon cancer. sadly, he never had a colonoscopy. he was 84 years old so it shows the importance of having to colonoscopy like once every three years or once every five years. i do it once every three years. >> yes, and i know you're a huge advocate of screening and no matter month than march, which is colon cancer awareness month. you learned from that mistake and we want people to follow the same exact thing. 143,000 adults die from colorectal -- are being diagnosed and 50,000 die from this disease. so still we have a lot of people that actually die from this. you're right that screening actually can save lives, starting at the