21.   Security became a problem at one Brown School campus earlier this year.

22.   Security will soon become even greater under measures announced by President Bush on Thursday.

23.   Security has become crucial for democracy, Chinchilla said.

24.   Security became a hot topic of conversation at the Super Bowl on Monday, when a helicopter interrupted the Denver Broncos practice session.

25.   Security has become a booming industry.

26.   Shula, whose job security has become a matter of daily speculation in Cincinnati, pondered that notion.

27.   So, financial security often becomes a source of stress and worry.

28.   Some are also suggesting that airport security has become an issue of national security and should be made a function of the federal government.

29.   Since a recent string of Ecstasy arrests at the club, security has become unforgiving.

30.   The action also is expected to boost bonds prices because fixed-income securities become more appealing when interest rates fall.