21.   No protesters were on the rain-soaked streets Saturday, but security remained extremely tight.

22.   Police security remained very tight on the island today in the wake of the protests.

23.   San Francisco International Airport spokesman Ron Wilson said the extra security would remain in force indefinitely.

24.   Security remains a widespread problem throughout northern Afghanistan.

25.   Security remained tight amid protests and fears of rogue terrorism.

26.   Security Friday remained unusually rigid.

27.   WEAKNESS IN TREASURIES Prices of Treasury securities remained depressed, with traders cautious before key economic reports and amid new corporate and international issues.

28.   While Europe is moving toward uniform standards on everything from olive oil to currencies, security remains a preserve of national sovereignty.

29.   While many nations are opening their markets through more free trade, food security remains a jealously guarded principle.

30.   With such avant-garde human technology, security here remains tight.