1.  And some bus and train companies shut down too, fearing additional terrorist attacks.

2.  And they moved Wednesday to alert the public to the possibility of additional attacks.

3.  Authorities across the United States took added precautions against additional terrorist attacks.

4.  Bus and train companies, fearing additional terrorist attacks, shut down as well.

5.  Clinton warned Saddam Tuesday that he risked additional attacks if he did not alter his behavior.

6.  Delaying our retaliation while we marshal evidence will not increase the risk of additional terrorist attacks in the short term.

7.  For Horn, Christmas is more important than ever this year, against the backdrop of anthrax scares and vague warnings of additional terrorist attacks.

8.  Following warnings of additional attacks, Israeli security forces went on heightened alert and continued to close off the West Bank and the Gaza Strip.

9.  However, security officials have tried to keep the two men separated in the case of additional attacks.

10.  Investigators believe they were planning additional attacks on American entities in Europe.