1.   A warning from Attorney General John D. Ashcroft to Massachusetts officials sparked widespread fear in the week after the attacks, but no threat materialized.

2.   After Christmas, mall owners also realized that the e-commerce threat had not materialized.

3.   But Henderson stressed that the vaccine would be injected only if the bioterrorism threat materialized.

4.   Now the Russian threat has finally materialized, but in a very different form.

5.   That threat never materialized.

6.   The threat never materialized.

7.   Threats have not materialized yet in Washington over the NATO issue.

8.   But his threat did not materialize.

9.   But that threat never materialized and the Soviet Union dissolved without a shot being fired against the West.

10.   But the threat never materialized as a serious option, and IOC president Juan Antonio Samaranch has largely succeeded in placating Nebiolo.