Biden vows to defend Taiwan if China invades

President Biden warned Beijing not to invade Taiwan and said he would intervene with the military if necessary. The simple yes appears to defy a longstanding policy of “strategic ambiguity” as U.S. policy doesn’t require military intervention. Taiwan expressed gratitude for the news; China suggests the U.S. should refrain from making wrong signals. Defense Secretary Lloyd Austin says U.S. policy “has not changed.”