Sara Wykes began smoking at 19 and continued to smoke for the next 30 years. Today, 15 years after quitting, Wykes has decided to take advantage of newly approved CT lung cancer screening guidelines and find out what damage all those years of smoking may have done to her lungs. In this third part of the three-part series, Wykes sits down with Stanford Radiologist, Dr. Ann Leung, to go over what the images show.