11.  Among the question marks is whether the state is prepared to respond to bio-terrorism and contain any outbreak of infectious disease caused by such an attack.

12.  And officials questioned whether such an attack could even be carried out via the mail.

13.  As for PBS, even the hint of its carrying such an attack in these parlous times would bring a bolt of congressional lightning.

14.  At the same time, experts warn that if such an attack were successful, the United States would be woefully unprepared.

15.  A lawyer for the company argued there was no way anyone could foresee such an attack.

16.  A nation making such an attack could expect instant destruction.

17.  After the missile tube was found, U.S. commanders checked their records but found no reports of such an attack from any U.S. aircraft.

18.  But even for Ms. Alickaj, a young woman described by her friends as unusually strong, admitting such an attack is both trying and dangerous.

19.  But even if cities were well equipped for a bioterrorist attack, they would still have a difficult time recognizing that such an attack had occurred.

20.  But if Americans were given the choice beforehand, when such an attack came many probably would already be vaccinated.