Live coverage: Facebook kicks off f8 conference

Facebook's f8 developers conference marks the rise of the chatbots. The social networking giant unveiled its Messenger Platform on Tuesday, which will leverage "chatbots" that interact with users and perform several tasks while remaining in the app, including shopping. For a recap of the keynote, scroll down for our live updates. "So we set out to build the perfect 360-degree camera," he says. Facebook unveils the Facebook Surround 360 camera.