Now Playing: 09-26-12 Marketplace Mid-day Update

More protests are expected in Spain today after some big demonstrations last night. There's outrage over a new round of budget cuts as Spain tries to avoid becoming the next Greece. New home sales in the U.S. fell in August. A new study finds that total knee replacements have more than doubled in the past two decades. What does that mean for health care costs? Plus, stories on wind farms in Oregon, 3-D printing retailers, and the controversial NFL call that led to a loss for the Green Bay Packers.