21.   Nevertheless, national security issues and the incidence of military conflict remain highly significant.

22.   None the less, Zahedi had easy access to Zbigniew Brzezinski, Carters national security adviser.

23.   Not only is it an urgent national security issue, it must be treated as such.

24.   Some senators muttered darkly about the threat to national security.

25.   The crisis sparked after the ruling party rushed through revisions of the labor and national security laws in a semi-secret parliamentary session.

26.   The information we received is of a highly confidential nature and relates to national security.

27.   The number of people who join the army is so low that it is beginning to threaten national security.

28.   The problems with the stock arose soon after Lake assumed the post of national security adviser almost four years ago.

29.   Then national security adviser Anthony Lake also said he was not informed.

30.   These measures are seen as essential for national security.