Congress grills social media execs about impact on kids

A Senate committee is widening its investigation into the impact social media platforms have on children, teens and young adults, with more apps facing congressional scrutiny. William Brangham reports with Jean Twenge, a psychology professor and author of "iGen: Why Today's Super-Connected Kids Are Growing Up Less Rebellious, More Tolerant, Less Happy — and Completely Unprepared for Adulthood."