While IS and bloody defeats in its strongholds make headlines, more silent threats loom large.
Ahmad Khan Rahami may not have been a very effective terrorist. He may not have been connected with a wider terrorist network. He may not have been fully committed to his cause. But we know that Rahami is a test case for what law enforcement and counterterrorism officials fear the most.
If there was any illusion that the fight against the extremist group Islamic State (IS) was nearing its final chapters, that naive notion should have been shattered in the last few weeks.
What are the chances of another 9/11-style attack occurring, and is it possible to measure the importance of the detainees who are still locked up in Guantanamo Bay?
