Group Security Crossword Puzzle

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Across
  1. 4. keep watch over by regularly walking or travelling around it
  2. 6. another word for human beings
  3. 9. close observation, especially of a suspected spy or criminal
  4. 11. barrier or railing, or other upright structure made of any material enclosing an area of ground to control or prevent unauthorized access
  5. 14. facts provided or learned about something or someone
  6. 15. a thing or things belonging to someone
  7. 16. long-term shifts in temperatures and weather patterns
  8. 17. common type of scam that people fall prey to
  9. 18. body measurements and calculations related to human characteristics
Down
  1. 1. the action of protecting, or the state of being protected
  2. 2. an unmanned aerial vehicle
  3. 3. formal or systematic examination or research
  4. 5. the action of functioning or the fact of being active or in effect
  5. 7. zero tolerance
  6. 8. the action or process of identifying someone or something
  7. 10. a conference or meeting to discuss a particular subject
  8. 12. the act of compelling observance of or compliance with a law, rule, or obligation
  9. 13. a device for recording visual images in the form of photographs or films