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On the afternoon of Aug. 8, 2025, I was in my office at the Centers for Disease Control and Prevention when I heard what sounded like hammering outside. One of my laboratory directors appeared at my door. She shared that her husband, in the 12-story building next door, said his building was shaking. Construction, on a Friday near quitting time? That didn’t fit.
Then she said that people feared it was an active shooter.



