21.   I must have been in a state of heightened awareness.

22.   In a crisis when people are feeling vulnerable, a heightened awareness can be a coping mechanism to defend against future threats, he said.

23.   Longer airport check-ins and a heightened public awareness can minimize the risks.

24.   Many proponents say that whether or not reparations come, they take some satisfaction in the heightened awareness of the issue.

25.   One reason for the increase in recalls is a heightened awareness of the safety issues surrounding giveaway toys.

26.   Renewed weakness in Asian markets, as well as heightened awareness that hostilities may soon break out again in Iraq, increased the jitters.

27.   Since then, there have been heightened public awareness campaigns to encourage helmet use, especially for children.

28.   Spending hours in an oasis of civilization somehow made it easier to endure the heightened awareness of just how fragile civilization can be.

29.   Terrorism experts expressed hope that the Oklahoma City bombing will lead to a heightened awareness about the potential for similar attacks.

30.   The case arises at a time of heightened awareness about the behavior of global corporations in Third World countries.