Many shoppers are about to take a moment to recall if they've been to a Target store in the last few weeks. The U.S. Secret Service says it's investigating credit card and debt card thefts starting the day after Thanksgiving and possibly continuing through last weekend. Target isn't commenting yet. And, this week, Marketplace has been reporting on the good, bad, and the ugly of exporting U.S. coal from the Pacific Northwest to China. The world's second biggest economy burns more coal than the rest of the world combined. That's generated record levels of air pollution, but, as Marketplace learned when we visited a mining town, it's polluted China's waterways, as well. We take you to the heart of China's coal country.