Understood, but that’s not the question.
If the US knows they have a line on actual isis terrorists, why do THEY not go and apprehend them as quickly as possible? Surely they know where they can be found.
The mayor’s stand down order is a different issue.
They think they don’t have enough evidence to charge them and a judge will just turn them loose. They also have many such reports that prove to be wrong. They now have 35000 radical jihadists in the U.K. Who knows how many in Spain and France.