The US has flown two B-52 bombers 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".
A Pentagon spokesman said the planes had followed "normal procedures".
The islands, known as Senkaku in Japan and Diaoyu in China, are a source of rising tension between the two nations. Full story
Related:
US is Encircling China with Fighter Jets and Stealth Bombers - The Diplomat
