Why al-Shabab is trying to inspire Muslim backlash in Kenya

Aired: 4/2/2015 | 0:04:21 | Clip
Al-Shabab, a Somali-based terror group, claimed responsibility for today’s siege on a Kenyan university. The militants began cross-border strikes after Kenya sent its military into Somalia four years ago. Gwen Ifill talks to Kenneth Menkhaus of Davidson College about the group’s motivations for attacking Kenya.