Expressed in example sentence
And so you have a lot of those arcs of instability in the world right now, in places like Syria, where there's a civil war going on and you have massive numbers, thousands and thousands of foreign fighters who are coming into Syria to learn how to be terrorists and practice that activity, and lots of those people are Westerners who hold passports to European countries or in some cases the United States, and so they are basically learning how to do jihad and have expressed intent to go out and do that later on in their home countries.