A quarter of a century after the Al-Qaeda attacks on the United States, jihadist groups still pose a major threat to security in Europe, but a new menace has surfaced that is driven mostly by young people online and the authorities are worried. Read more: ↧ EU warns of new menace 25 years after 9/11 as online youths seek vi... Jihadist groups still pose a major threat to Europe, but 25 years after the 9/11 attacks a new menace driven by young people online is emerging