1.   At the same time, the FBI issued a nationwide alert to all U.S. law enforcement officials requesting that they be on guard against any suspicious activity.

2.   A nationwide alert for a possible terrorist attack was temporarily relegated to secondary priority, and police concentrated most of their efforts on helping motorists.

3.   Federal officials said at the time that a terrorist threat directed against Kennedy Airport and concern over Middle East politics were the prime reasons for the nationwide alert.

4.   Justice Department spokeswoman Mindy Tucker said the department had fresh intelligence that warranted a nationwide alert.

5.   Several nationwide alerts have been issued by the Department of Transportation.

6.   These are, indeed, tenuous, unfamiliar times when the FBI announces a nationwide alert and the president tells us to go shopping.

7.   After the attack, Danish police were put on nationwide alert.

8.   After the attack, Danish police were placed on nationwide alert.

9.   Air raid sirens wailed throughout Yugoslavia on Tuesday, the first time a nationwide alert had sounded since the allied strikes began in late March.

10.   Air raid sirens wailed throughout Yugoslavia on Tuesday, the first time a nationwide alert had sounded since the allied strikes begun in late March.