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National security concerns
Answer for the clue "National security concerns ", 9 letters:
airspaces
Alternative clues for the word airspaces
Word definitions for airspaces in dictionaries
Wiktionary
Word definitions in Wiktionary
n. (plural of airspace English)
Usage examples of airspaces.
We are still in Class G airspace, far enough away from lower class airspaces, such as Class E, D, or C, which necessitate radio contact.