The Berlin Heart is an artificial heart, child-sized. It's this little pump that helped keep Lindsey Bingham, one of those featured in Dateline NBC's Sunday report "Where the Heart Is"," alive for nearly eight months while she waited for a donor heart. To hear more about the Bingam family's remarkable story, tune in Sunday, January 17 at 7/6c, 9pm PST.Jan. 17, 2016