This Is How ISIS Smuggles Oil

``The oil brings Omar to town weekly, huddling with grease-covered men to negotiate the purchase of faded, 17-gallon drums. A Syrian in his thirties, Omar was once a proud rebel in his country's civil war. Now he's a merchant in the trade that bankrolls the extremists who hijacked it: the Islamic State of Iraq and Syria, or ISIS. The militants can make more than $1 million a day selling oil from fields captured in eastern Syria. But the way this shadowy trade works on the ground remains largely unknown. ''