With a massive government stimulus that's fueled a frenzy of building, China's economy grew by 8.9% in the third quarter, compared to the United States' 3.2%. But growth also means stock-market and real-estate bubbles, a shrinking private sector and a restive working class. Emphasis on manufacturing has created world-class pollution, and now China's trying to go green at the same time it builds coal plants and imports oil. Does China, holding 23% of America's debt, threaten this country's interests? Will global problems force the US and China to be partners as well as competitors?