What motivated these teens to become Islamic State brides?

Aired: 8/17/2015 | 0:08:40 | Clip
In London, three seemingly normal and high-achieving teenage girls recently left their homes to join the Islamic State terrorist group in Syria, leaving their families to grapple for answers. Their story is the subject of a new multimedia report by The New York Times. Judy Woodruff talks to New York Times video journalist Mona El-Naggar and Steven Simon of Dartmouth College.