Few moments in modern financial history were scarier than the week of Sept. 15, 2008, when first Lehman Brothers and then American International Group collapsed. Who could forget the cratering stock markets, panicky bailout negotiations, rampant foreclosures, depressing job losses and decimated retirement accounts -- not to mention the discouraging recovery since then? Yet a Chinese crash might make 2008 look like a garden party. As the risks of one increase, it's worth exploring how it might look. After all, China is now the world's biggest trading nation, the second-biggest economy and holder of some $4 trillion of ... (full story)