Expectations low for U.S.-China state dinner

CNN: Presidents Barack Obama and Xi Jinping will trade platitudes and raise a glass to 40 years of U.S.-China ties at a state dinner on Friday night.

But protocol will not disguise the reality that the relationship between the world's sole superpower and the rising Asian giant is becoming ever more treacherous, with disagreements over Beijing's territorial claims in the South and East China Seas, charges of cyberhacking, military tensions, trade rows and human rights recriminations.

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