21.  Not only is Jack Ryan being played by the relatively callow Ben Affleck, but scenes of a major terrorist attack are reportedly freaking out test audiences.

22.  Officials say that debriefings of detainees have in some instances provided general warnings of another major attack that dovetail with the threats picked up in the intercepted communication traffic.

23.  One event that could trigger a sharp fall would be another major terrorist attack on the U.S. mainland.

24.  Or Iraq could launch a major attack.

25.  Senior administration officials never tire of saying in public or in private that they remain deeply concerned that another major attack on the United States is inevitable.

26.  Russian troops here are anticipating a major attack in the next few days.

27.  Such restrictions have become a standard Israeli response after major attacks, one aim being to keep the peoples apart until tempers cool.

28.  Taken together, the officials said, the steps have lessened the chances of another major attack on the United States.

29.  The bombing was the third major attack on Westerners in Pakistan this year.

30.  The FARC maintains hundreds of urban militias here, but they rarely attempt major attacks or high-profile political assassinations.