Some of us are big criers, some of us are not. Today: Two tears experts who have experimented with this idea in the lab and in real life let us in on their insights.

Today: a story about defusing conflict when emotions run high, from someone who's made it her life's work. We hear from Shneaqua Purvis, better known as Coco, the founder and C.E.O. of Both Sides of the Violence in Brooklyn, New York. After losing her sister to gun violence, Coco devoted her life...