A linguistics expert believes the man who threatens the West in an Islamic State video purportedly showing the beheading of 21 Coptic Christians was educated in the United States. But Erick Thomas, a professor of acoustics and dialects at North Carolina State University, says it's unclear whether the mysterious, shrouded figure in the video released on Sunday is from the U.S.

The shocking images of a Jordanian Air Force pilot being burned alive in an outdoor cage by ISIS terrorists have galvanized the country, once seen as possible fertile recruitment ground for the group, behind King Abdullah II's calls for a stepped-up military campaign.

In the five months since Jan Morgan banned Muslims from her gun range in Hot Springs, Ark., business has boomed and predictions of a lawsuit brought by federal civil rights enforcers have so far proved inaccurate.