ISIS terrorists reportedly have hundreds of hostages from around the world, which they hold for ransom.
As it turns out, kidnapping is big business. Between 2008 and 2015, terrorist groups have reportedly collected more than $125 million in ransom payments. But terrorists don't just kidnap to make money, they can make way more selling oil — roughly $3 million per day.
This TestTube News video explains other reasons they abduct people and the pros and cons of negotiating with terrorists:
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