"WASHINGTON, USA - Islamic State extremists fighting in Iraq and Syria pose an "immediate" threat to Europe as a significant number carried European passports, top US intelligence officials said Friday, September 5.
The danger presented by jihadists potentially returning to the West to carry out attacks has prompted more cooperation between US and European intelligence agencies in a bid to track terror suspects, the officials said."
http://www.rappler.com/world/regions/europe/68314-isis-europe-threat