What we get wrong about mass shootings and how to curb them

Shootings in Pittsburgh and South Carolina this past weekend brought the year’s number of mass shootings (in which four or more people were killed) to 146. William Brangham talks to Mark Follman, a journalist who has long covered gun violence, about the deadly mix of political volatility, pandemic stress and rise in gun sales, what people get wrong about mass shootings and how to break the cycle.