21.   They welcomed stricter security checks, which included pat-downs and baggage searches.

22.   This structure will allow Gordon to ensure that stricter security guidelines are drawn up and followed at all nuclear weapons laboratories.

23.   After the hour-long meeting, U.S. officials said Perry and Fahd agreed that the size of the bomb had changed their thinking about the need for stricter security.

24.   But potential protesters were weeded out by security even stricter than that accorded to the Swiss president.

25.   California, Colorado and Illinois state government buildings were under stricter security.

26.   Federal courthouses and offices nationwide were closed or put on stricter security.

27.   Federal Express and United Parcel Service, which rely on their own planes, said they will continue to fly but are instituting stricter security in California.

28.   He also said Vietnam Airlines has implemented stricter security measures, including increased cockpit security, more thorough passenger checks and more security personnel on flights.

29.   Jackson also called for stricter security measures aboard planes, including stronger cockpit doors and better training for flight staff to prevent attacks.

30.   Overzealous fans at the soccer games have also proven to be a serious problem, and have brought demands for stricter security from the Asian Football Confederation.