sam altman was back as the ceo of openai a dizzying, whirlwind few days in tech, which surely cements altman s position as one of the foremost figures in artificial intelligence if he wasn t already. the turning point was an open letter signed by almost all the employees, some 700 of them, demanding his return. hard to imagine how the existing board would prevail if the entire workforce including some of al s brightest coders were proposing to walk out the door. the company which created the popular app chatgpt says it is also shaking up the board. greg brockman, the co founder and president, is back. out go two of the board members who called for altman s ouster, and in comes a new chair, the former sales force ceo bret taylor, and someone bryan will know well, the former treasury secretary, larry summers. joining me now is melissa heikkila, who is a senior reporter for al at mit techonolgy review. thank you for coming on the programme thank you for coming on t