11.   The lack of security measures provides an open invitation to crime.

12.   There are increased security measures at airports.

13.   Tighter security measures are restricting our freedom of movement.

14.   Video surveillance cameras have been installed as a security measure.

15.   Will the new security measures infringe on our liberty?

16.   He remarked on the difference in security measures at the two airports.

17.   Strict security measures are in force in the capital.

18.   This second door is an extra security measure and can be locked in position during the day.

19.   The Turkish president has gone on television to defend stringent new security measures.

20.   Such security measures may well be overkill.