Rex Tillerson was Exxon’s CEO from 2006 until his retirement shortly before becoming U.S. secretary of state in the Trump administration in 2017. President Donald Trump fired him a year later. Credit: Nicholas Kamm/AFP/Getty Images Former ExxonMobil chief executive Rex Tillerson took the witness stand Wednesday in the company’s climate fraud trial and gave the clearest defense yet for his former employer. Tillerson denied that the oil giant misled investors about the risks it faced from future climate change regulations and described a detailed system he had implemented for managing those risks. But he also repeatedly said he was unable to recall key details and events that are central to the case, omissions that a lawyer for New York’s attorney general’s office returned to again and again. While Tillerson was the most high profile and perhaps most important witness called so far in the state’s case against Exxon, the […]