How the women of the YPJ led the fight against ISIS

In the years-long battle to retake northeastern Syria from ISIS, a small but powerful band of fighters led the way. The women of the YPJ, a Syrian-Kurdish force, fought alongside their male counterparts and face-to-face against ISIS. Author and journalist Gayle Tzemach Lemmon spent years reporting on their stories. She joins Amna Nawaz to discuss her new book, "The Daughters of Kobani."