US President Joe Biden was caught on a hot mic telling leaders of the Quad nations that China was testing them, thus reflecting upon the American seriousness of the emerging Chinese threat.

US President Joe Biden was caught on a hot mic at the Quad Leaders' Summit, discussing China's aggressive behavior and economic challenges. He emphasized the need for intense diplomacy to address these issues.

Senior Biden administration officials told reporters ahead of the meeting that the leaders would announce plans to expand an Indo-Pacific Partnership for Maritime Domain Awareness, launched two years ago to include the Indian Ocean region.