He Fired Sam Altman. Now He Has to Work With Him.

In the surprise ouster and restoration of Sam Altman as chief executive at OpenAI, only one person, Adam D’Angelo, managed to play a role on each side of the drama. 

D’Angelo, a former Facebook executive and founder of the question-and-answer platform Quora, was one of four members of the board who fired Altman, and the sole surviving director named to a new board of the artificial-intelligence company that took over on Wednesday.