Now Playing: 12-23-11 Marketplace

Congress passed the payroll tax cut extension. What does this mean for backers of Fannie Mae and Freddie Mac? The "war on cancer" celebrates its 40th anniversary. Doula training programs are sprouting all over the country. Commentator Kat Ahn talks about what it's like to have her parents move in. If you're looking for frankincense this Christmas, the tree resin may be a little harder to find. And we look into why the NBA has become a Christmas tradition.