An integral part of covering the nation's more than 46 million uninsured that has been discussed by President Barack Obama and key members of Congress in Washington is the so-called insurance exchange. So what is an insurance exchange, and exactly how would it work? Linda Blumberg, an economist and senior fellow in the Urban Institute's Health Policy Center, tells host Bruce Japsen about movements in states and the federal government to use insurance exchanges as a way to cover more Americans with health benefits.