Abdul-Rahman Kassig
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Abdul-Rahman Kassig's parents speak about their loss

The family of Abdul-Rahman Kassig are giving a brief statement about their loss, after the US aid worker was killed by Islamic State (IS) militants.

The 26-year-old is the fifth Western hostage to be killed by IS, which controls large parts of Syria and Iraq.

Go to next video: Kassig was 'an incredible person'