Which of the following could indicate a possible terrorist attack?

• A. A public celebration with lots of people
• B. Routine weather patterns
• C. Strong chemical odors without apparent reason
• D. Typical delivery schedules

Answer: (C)

Strong chemical odors without an apparent reason are a red flag because, in a public setting, an unfamiliar or unexplained chemical smell can indicate the release of a hazardous substance. Odors can point to a chemical release or attack, and recognizing that cue helps you take immediate safety steps: move to fresh air, avoid staying near the source or downwind if possible, and report what you smell, where you are, and when it started to emergency responders. This kind of clue is why it’s treated as a potential threat worth notifying authorities, rather than normal events like a large celebration, routine weather, or standard delivery schedules, none of which by themselves suggest a deliberate chemical release.