Now Playing: 1-28-13 Marketplace Morning Report

This morning, we'll get a look at quarterly earnings from Caterpillar. The construction and mining equipment company's performance is seen as a key bellwether for the global economy, and Caterpillar's latest numbers could provide some insight about the strength of U.S. exports. Over the weekend, a new rule went into effect for smart phones: It is now illegal to unlock your phone without your provider's permission. And, a look at a Canadian company that makes the special paper on which money is printed.