An Islamic State video purporting to show the beheading of Steven Sotloff, a US journalist abducted by the group, is released.
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- Who supports Islamic State?
- The rise of IS
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More than 30 teenagers held at a juvenile detention centre in Tennessee escape by crawling through a fence and 17 are still being sought.
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- Girl, nine, shoots gun tutor dead01:30
- Freed journalist 'overwhelmed'01:36
How the shooting of a black unarmed teenager sparked days of unrest and made a nation look at itself.
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