Bloomberg report says several U.S. companies were compromised by spy chips inserted secretly by the Chinese on computer motherboards. Bloomberg article should be used as a starting point for a serious, and long overdue discussion of supply chain risks, Aaron Carroll says. Carroll: Im dubious of these particular claims involving secretly installed Chinese chips. We know for sure that the Chinese government has broken into thousands of companies, both over the internet and using human spies, and stolen nearly every secret that was worth stealing.”]