US would destroy Taiwan's semiconductor factories rather than letting them fall into China's hands, a former national security advisor says

• A former national security advisor said the US would "never" let China gain hold of Taiwan's semiconductor factories.
• Robert O'Brien told Semafor that China could "control the world economy" with the factories.
• TSMC is the world's largest chipmaker, powering most of the devices and equipment used every day.

A former national security advisor said the US would destroy Taiwan's semiconductor factories if China seemed on the verge of controlling them after an invasion.