Elon Musk has taken ownership of Twitter. The tycoon celebrated by strolling into the company's San Francisco headquarters, carrying a porcelain sink. Twitter is already making changes. Kanye West's account was reinstated after being suspended for an antisemitic rant. Twitter's 7,500 employees are also reportedly "on edge" as they "brace for massive layoffs." The concern comes as Musk fired top Twitter executives on his first day.