New tape shows 2nd beheading

Knife-wielder warns Obama

Posted: September 3, 2014 at 5:31 a.m.

The Islamic State extremist group released a video Tuesday showing the beheading of a man identified as American journalist Steven Sotloff and warning President Barack Obama that as long as U.S. airstrikes against the militant group continue, "our knife will continue to strike the necks of your people."

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