article_snippet.sent: The flurry of arrests -- at least 25 people have been detained since January -- is a sign that complicated, manpower-intensive investigations begun when ISIS started seizing swaths of territory a year ago are finally being completed.
article_snippet.sent: And while the large number of arrests show that law enforcement officials are succeeding in law enforcement officials disruption efforts, it also means that U.S. authorities don't see the lure of ISIS receding any time soon.
article_snippet.sent: We are opening cases quicker than We are closing cases," the U.S. counterterrorism official said.