6. Facebook CEO Mark Zuckerberg sent around an internal memo addressing employee concerns about the fact that board member Peter Thiel is a Donald Trump supporter and has donated $1.25 million to his campaign. "We care deeply about diversity," he wrote. "That's easy to say when it means standing up for ideas you agree with. It's a lot harder when it means standing up for the rights of people with different viewpoints to say what they care about. That's even more important."