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Is China key to boosting US economy?

President Obama is on his way to a desert retreat in California where he will hold key talks with the Chinese leader Xi Jinping.

The meeting's all about cementing their relationship as well as tackling issues such as cyber attacks and North Korea.

The BBC's Mark Mardell looks at the close but often fractious relationship between the two superpowers.

Go to next video: Xi and Obama to talk cyber security