There's already so much uncertainty in the world and now it's being compounded, with China scrambling jets in response to a visit to Taiwan by the Speaker of the US House of Representatives, Nancy Pelosi. 

The headlines are worrying, pointing to the risks of an all-out war. 

Today, the ABC's East Asia correspondent, based in Taipei, Bill Birtles on the potential for a crisis in the Taiwan Strait. 

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Bill Birtles, ABC East Asia correspondent, Taipei, Taiwan