http://www.thejewishpress.com/news_article.asp?article=5731
Louis Rene Beres
"Al-Qaeda operatives, perhaps together with various Palestinian allies, are planning future attacks against the United States - most likely with chemical and/or biological weapons. This we know for certain. A nuclear 'dirty-bomb' event is also conceivable, although substantially less probable. But what do these prospective terrorists, destroyers of Americans really seek? Answers are almost always superficial and unhelpful."