If you have health insurance, you're more likely than someone who does not have insurance to get treatment, testing and drugs that you don't necessarily need, says journalist Shannon Brownlee. This broken system adds to the cost of healthcare of everyone, she says. Dr. Oz talks with Shannon about her book Overtreated: Why Too Much Medicine Is Making Us Sicker and Poorer and what she thinks America needs to do to improve the quality of medicine and develop a better healthcare system.