Good point. That "boogieman" crap might work for a bunch of ignorant 12th century dirt nomads, but over here it just makes for good comedy.
"As in an earlier message threatening Italy, the message is signed by 'Rakan Ben Williams' - or 'bin Wilyamz', as it is written in Arabic - and by the purported al-Qaeda mouthpiece, the Global Islamic Media Front (GIMF). "
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They have been mentioned before and found to be authentic Al Qaeda affiliates.