(Associated Press) Turkey says the United States is legally bound by a treaty to immediately hand over Fethullah Gulen, the U.S.-based Muslim cleric it accuses of plotting to overthrow Turkey's government.
The U.S. government says it can't comply until Turkey can convince a judge its allegations against Gulen are legitimate.
Any solution lies in the murky world of extradition, where the U.S. criminal justice system overlaps with diplomacy and international law.
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Unable to agree about the process, Turkey and the U.S. are feuding over Gulen, who denies involvement in the thwarted July 15 coup attempt. It's become the biggest irritant between the two strategic partners just as they struggle to reconcile their approaches to fighting the Islamic State group across Turkey's border in Syria.