[wrench]

If Al Qaeda had a nuke in Europe (or anywhere) they would have used it by now.

[Americanexpat]

Ditto to that.

[Greysard]

If Al Qaeda had a nuke in Europe (or anywhere) they would have used it by now.

They can use one nuke only once. But they can use the threat of using a nuke as often as they wish - and they still get to keep their nuke. Even if they don't have it, after all.