A `` threat stream '' from A series of al Qaeda-based threats to attack American and Western targets in Europe , as well as threats to launch attacks inside the United States , has caused significant concern inside the U.S. intelligence community , CNN has learned . al Qaeda groups has evolved during the past six months . The threats target Europe as well as the United States . They are not limited to a single group, but rather they have been directed at all of Western civilization and its institutions. So far , `` we do not see operational cells of al Qaeda inside the United States '' Al Qaeda in the Arabian Peninsula , based in Yemen , is of particular concern .
A `` threat stream '' from al Qaeda groups has evolved during the past six months . The threats target Europe as well as the United States . They are not limited to a single group, but rather they have been directed at all of Western civilization and its institutions. So far , `` we do not see operational cells of al Qaeda inside the United States '' Al Qaeda in the Arabian Peninsula , based in Yemen , is of particular concern .