Now, of course, this recent 'roundup' begs the question, "Why now?"
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OPINION-SPECULATION:
Answer 1. This is a test of the emergency-bag-a-bad-guy-roundup-system.
Answer 2. It was long overdue.
Answer 3. Warning: More roundups likes these are coming.
Answer 4. A combination of all of the above.
Answer 5. None of the above.