A joke made by David Letterman about terrorists didn't sit so well with them.

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David Letterman makes jokes and intentionally makes celebrities and politicians made on a daily basis. But now one of Letterman's jokes apparently made a Jihadist group mad.

Letterman made a joke about an Al-Qaeda leader and an Islam extremist did not like the joke. Now they are asking Muslim Americans for the tongue of David Letterman. In a post 9/11 world the FBI takes threats like this seriously and are investigating the matter.

For the fully story courtesy of CNN, click here.

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