With 33% of adults and 17% of children obese, the U.S. is facing an obesity epidemic. A major risk factor for expensive, chronic conditions like heart disease, diabetes, and cancer, it costs our health care system nearly $150 billion a year. Should government intervene, or is this a matter of individual rights and personal responsibility? On the "for" side: Regina M. Benjamin, MD, MBA and Pamela Peeke, MD. On the "against" side: Paul Campos and John Stossel.