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US bombers challenge disputed China air zone

26 November 2013 Last updated at 22:42 GMT

The US has flown two B-52 military aircraft over disputed islands in the East China Sea in defiance of new Chinese air defence rules, officials say.

China set up its "air defence identification zone" on Saturday insisting that aircraft obey its rules or face "emergency defensive measures".

Jonny Dymond reports from Washington.

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