Rukmini Callimachi

Journalist Rukmini Callimachi on what she's learned about ISIS tactics from her conversations with a German man who joined ISIS and became disillusioned, and from monitoring the organization's own encrypted social media channels.

Last year, journalist Rukmini Callimachi found thousands of al-Qaida documents in Timbuktu in Mali. She tells Fresh Air about al-Quaida's strategy of kidnapping Europeans and demanding ransoms.