the warfare crossword

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Across
  1. 4. Turkish drone famous in Ukraine (9)
  2. 6. Invisible to radar (7)
  3. 7. Acoustic pollution (5)
  4. 9. Metal for batteries (7)
Down
  1. 1. "Suicide" or loitering drone (8)
  2. 2. US Drone MQ-9 (6)
  3. 3. Unmanned Aerial Vehicle (3)
  4. 5. When a robot thinks alone (10)
  5. 8. Group of drones (5)