More than three years have passed since Facebook purchased virtual reality headset-maker Oculus VR for $2 billion. Now, with its fourth annual Oculus Connect event fast approaching, Mark Zuckerberg is demonstrating the unique ways he uses VR. While the rest of us goof around with friends, take selfies, and go live on the social network's virtual reality experience (known as Facebook Spaces), the company's CEO plugs in to coordinate his humanitarian endeavours. In the course of his latest virtual livestream, Zuckerberg met up with Facebook's head of social VR Rachel Dwyer. They then set course for Puerto Rico to explain how the tech giant is utilizing machine learning as part of its relief efforts on the island.