11.   Federal officials have been scrambling to shore up security against possible chemical or biological terrorist acts.

12.   For all the power and complexity of modern computer networks, practical computer security against cybervandals may ultimately be found in the commonplace concept of a burglar alarm.

13.   For security against military attacks, the villages used watchtowers and perimeter trenches filled with sharpened sticks.

14.   Furious settlers said the mall had no security against attack.

15.   Giuliani asserts that the new contract must provide security against labor stoppages by a service the city has a duty to supply.

16.   How, within the United States, did one balance the requirements of internal security against those of civil liberties?

17.   Intel spokesman Tom Waldrop says the system will provide an extra layer of security against data thieves.

18.   Israeli officials called the withdrawal, from Bethlehem and the nearby village of Beit Jalla, a test case for Palestinian guarantees of security against attacks on Israelis.

19.   ISS has built the business providing software, which protects computer networks and systems that monitor data security against intrusion by hackers.

20.   Its only achievement was to give the French a false sense of security against the Germans, who easily circumvented the Maginot Line by sweeping through Belgium.