Health care reform Q&A: One year later

WASHINGTON - One year ago Wednesday, President Obama signed that sweeping health care reform bill into law, with the intention of cutting the number of uninsured people in this country by about 30 million over six years.

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But the legal challenges soon came pouring in.

"CBS Evening News" anchor Katie Couric spoke with CBS News chief legal correspondent Jan Crawford about what's happened in the past year.

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Couric: What changes has the law made in the health care system so far?

Crawford: Quite a few, Katie. For example, the law says parents can keep their children on their insurance policies until they're 26 years old. That means another 1.2 million young adults will get coverage. It also bans insurance companies from denying coverage to children who have pre-existing conditions. That affects up to 17 million children. And it's given some seniors more money to buy prescription drugs.

Other parts of the law kick in over the next couple of years, assuming the Supreme Court doesn't strike it down.

Couric: What about the legal battles over the law? Could they actually derail health care reform altogether?

Crawford: Absolutely. There's a huge legal battle, and it's headed straight for the Supreme Court, possibly by the end of the year.

Twenty-eight states are challenging the law. They say it eviscerates the Constitution because it gives Congress unchecked power to meddle in people's lives and control their pocketbooks.

What they're focusing on is a provision in the law that says everyone has to buy health insurance starting in the year 2014 or pay a penalty. These states -- mostly with Republican governors or attorneys general -- say the Constitution doesn't give Congress that kind of power to actually make people buy something.

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    Jan Crawford is CBS News Chief Political and Legal Correspondent. She is from "Crossroads," Alabama.