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China looms over Obama Asia visit

23 April 2014 Last updated at 13:49 BST

US President Obama has embarked on a tour of Asia, but will not be visiting the major power in the region, China.

Chinese claims on disputed islands could see its increasingly muscular foreign policy come in to conflict with the US Navy's traditional dominance and Mr Obama's spheres of influence.

Rupert Wingfield-Hayes reports.