Dr. Vivek Murthy says social media makes kids feel worse about themselves, and they can't get off of it. He says "we need safety standards for social media the way we have for cars, for car seats."

NPR's A Martinez speaks with Director James Cameron about "Avatar: The Way of Water," the long-awaited sequel to his 2009 science-fiction blockbuster, "Avatar."

In Tunisia, 12 years after the revolution, citizens are still asking, "How do you expect me to make a living?"