On The Gist, the daughter of a Fort Hood victim explains how she became friends with the shooter's cousin. We'll speak with the HBO documentary Homegrown's filmmaker Greg Barker and subjects Kerry Cahill (the daughter), Nader Hasan (the cousin), and Philip Mudd, a veteran CIA and FBI counterterrorism official. Hasan and Cahill are both involved in the the Nawal Foundation. Mudd is the author of Takedown: Inside the Hunt for Al Qaeda. The documentary Homegrown is now available from HBO. For the Spiel, a special update about the New Hampshire primaries from the Realistic News Network™. Today's sponsor: Betterment, the largest automated investing service—managing billions of dollars for people just like you. Get up to six months of investing free when you go to Betterment.com/gist. Join Slate Plus! Members get bonus segments, exclusive member-only podcasts, and more. Sign up for a free trial today at slate.com/gistplus.

Learn more about your ad choices. Visit podcastchoices.com/adchoices