The intelligence officers must have felt guilty about profiling the boys.
You ever worked in a surveillance operation, they are expensive and very man hours resource hungry.
We don't live in a world of infinite resources.
There was the same problem in North Ireland, too many potential targets not enough resources.
The problem is working out who is a blow hard (Walter Mitty) and who is a potential bomber.
I remember before the election on here quite a few were talking about what they would like to do to Clinton when he was President.
Are they potential assassins or just blowing of steam.
We have a professional and well experienced security apparatus but we still make mistakes, sadly this was a bad one.