Is China Really a Melting Pot?

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First the Tibetans, now the Uighurs, are challenging China's central authority. Can 56 very different cultural and linguistic groups continue to get along? Also, questioning begins in confirmation hearings of Judge Sonia Sotomayor. On Reporter's Notebook, President Obama threatens a veto to stop building the F-22 warplane in favor of weapons he says US troops "actually…need."  Republicans—and Democrats are worried about jobs. 

Banner image: Ethnic Uighurs go about their daily lives in Xinjiang's famed Silk Road city of Kashgar in China's far northwestern, mainly Muslim Xinjiang region. Photo: Peter Parks/AFP/Getty Images