Jonas Salk: At the end of my first year of medical school, the professor of chemistry, Dr. R. Keith Cannon, tapped me on the shoulder and asked me to come to see him. I was quite sure that he was going to tell me that I was failing and give me some bad news. Instead of which, he offered me an opportunity to drop out for a year and work with him in chemistry, during which time I could have my first experience in research, and also as a student teacher, so to speak. Since my desire, from the time I entered medical school, was to enter into and to do scientific research, that was the break that I seized upon. It was a difficult decision to make, because I would have to leave my class, be alone, and in a sense be exceptional for that year, and then return to anther class. Nevertheless, I had the courage to do so.