The recorded voice, posted on an Islamist Web site, told the group's U.S. foes, "We haven't had enough of your blood yet."
The speaker called U.S. President Bush a "lame duck" and labeling outgoing U.S. Defense Secretary Donald Rumsfeld a "coward." Bush is advised not to "run away as your lame defense secretary ran away," referring to Rumsfeld's resignation this week.
The message saluted the U.S. congressional election outcome as a vote "for a level of reason."
Notable deaths of 2014 [PHOTOS]