OpenAI: The cast of characters of Silicon Valley’s latest, juiciest upheaval

​ When technology firm OpenAI ousted its CEO Sam Altman last week with little warning and less explanation, it set off shockwaves throughout Silicon Valley and beyond. Late Tuesday, in a complete reversal, he rejoined the controversial firm he had helped found, effectively bouncing from the board some of the people who had fired him. Read More Breaking News, Latest News and Videos | CNN