A decade ago, the U.S. released three Moroccan militants from Guantanamo, turning them over to Morocco's government. They wound up leading one of the most violent Islamist groups in Syria's civil war.... more 
A decade ago, the U.S. released three Moroccan militants from Guantanamo, turning them over to Morocco's government. They wound up leading one of the most violent Islamist groups in Syria's civil war. WSJ's Maria Abi-Habib shares exclusive details. Photo: Mohammed Hakiki less 
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