Peter Kassig's letter to his parents

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UP NEXT
'The death of Baghdadi is the death of the image of ISIS'
05:22
The significance and impact of ISIS leader’s death
06:07
NYT: Custody of ISIS fighters in doubt
07:55
Turkey using militias to advance in Syria, including former Al Qaeda and ISIS members
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Backlash against Trump for Syria withdrawal includes GOP
23:01
Pentagon report blames Trump administration for ISIS resurgence
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