Millennials are often dubbed "young invincibles" for their propensity to stay healthy, and forgo health insurance. Host Michel Martin speaks with Kaiser Health News correspondent Jenny Gold about how the Affordable Care Act will impact "invincibles," and how they might be the key to the program's success.

Many users trying to sign up for the new health care marketplace on Tuesday hit technical glitches and slow downs. Programmers say the tech powering Obamacare online can be very complicated. And the administration urges patience.

The grain hasn't quite taken off yet, partly because of perception issues. But farmers are optimistic that the grain, which is high in protein and gluten-free, can compete with quinoa.

There was a party atmosphere at Affordable Care Act events both in California, where the law has been embraced by the state government, and in Virginia, where it has been resisted. But consumers will have very different experiences in the two states.

Florida resisted implementing the Affordable Care Act. Now, in the absence of the state encouraging people to sign up for insurance on exchanges set up under it, other groups have stepped in.

Navigators are a key part of the health law rollout. They work at nonprofit organizations, and they're being trained to help people learn about their coverage options. In some areas that training is still going on, even though the exchanges are up and running.

On the first day of the new health care marketplaces opening Tuesday, Illinois Gov. Pat Quinn is touting the benefits of the Affordable Care Act. This, even though he couldn't manage to convince his legislature that the state should run its own exchange, leaving Illinois to partner with the federal government.

The first day of sign-up for the Affordable Care Act was marked by numerous computer glitches. President Obama said issues with government's website that allows people to compare plans and sign up for health insurance plans were caused by a flood of people logging on.

We'll hear how things went in California Tuesday as people started to sign up for insurance in the Affordable Care Act.