Elon Musk fired Twitter's entire board of directors Monday, just a week after finalizing the $44 billion takeover of the social media giant. The swift move made the Tesla and SpaceX CEO the sole director of Twitter. "This is just temporary," tweeted Musk after purging the company's top leadership. Among those fired were Chief Executive Parag Agrawal, Chief Financial Officer Ned Segal and former chairman Bret Taylor. What a guy ...