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Published on Aug 17, 2015
Subscribe to France 24 now: http://f24.my/youtubeEN FRANCE 24 live news stream: all the latest news 24/7 http://f24.my/YTliveEN US hostage Kayla Mueller was raped repeatedly by Abu Bakr al-Baghdadi, the self-proclaimed caliph of the Islamic State (IS) group, before her death, according to US intelligence officials.