As anti-Americanism has flared in the camps, security has tightened for Western relief workers.

As concerns have mounted that there could be terrorist attacks on Americans living abroad, the once easygoing security at the school here has tightened.

But as followers of Mr. Burroughs's ideologies have become attuned to the writer's whereabouts, the security surrounding him has tightened.

It wants security tightened further, too, and is asking Federal officials to end the practice of issuing boarding passes through travel agencies and corporate travel offices.

That was just weeks after 9/11, and national security was tightening.

Los Angeles was a city of anger, fear and relief today, with security tightened at many Jewish organizations.

We must also note that paragraph 15 states that all luggage must be screened and security tightened.

As security by the American troops tightened, the impoverished residents of Cap-Haitien took the opportunity to humiliate the police.

It is unusual for citizens to attend commission meetings, he said, and security in Washington had tightened since Sept. 11.

Since the terrorist attacks, security has tightened at general aviation terminals housed at airports that also serve airlines.