After heated criticism of Facebook's role in disseminating "fake news," Mark Zuckerberg has declared that he wants to make the social media company "good for people's well-being." It's the height of hypocrisy, then, that the company has launched Messenger Kids, its first-ever app for children under the age of 13.

How do we help children cope with fear of nuclear war?

For the first time in decades, the news is filled with speculation about a possible nuclear war.