Facebook has a deal to buy the messaging platform WhatsApp for $16 billion, the company announced. WhatsApp has more than 450 million users, according to the latest numbers from the company, and Facebook has been in the market for the hot messaging space. "WhatsApp is on a path to connect 1 billion people. The services that reach that milestone are all incredibly valuable," Facebook CEO Mark Zuckerberg said. "I've known Jan [Koum] for a long time and I'm excited to partner with him and his team to make the world more open and connected." WhatsApp is a direct competitor...