Guest: Samuel Epstein, M.D.

In 1971, Richard Nixon declared war on cancer, but Dr. Samuel Epstein says we have been losing the battle ever since. He says we have made two basic mistakes: we have spent most of our resources on treating cancer once it strikes and have almost ignored prevention. Today on Focus, we'll talk with Dr. Epstein about the future of this medical struggle and his book Cancer-Gate: How to Win the Losing Cancer War.