Understanding Boko Haram’s expanding reach

100 days since schoolgirls’ abduction, what explains Boko Haram’s expanding reach? More

It’s been 100 days since nearly 300 young schoolgirls were abducted by Islamist militants from a town in northeastern Nigeria. Chief foreign affairs correspondent Margaret Warner reports on the growing threat that Boko Haram represents in Nigeria and around the globe, and what’s allowed them to expand their reach.

AIR DATE 7/23/14