1.   Although he has appeared in person in several American cities in recent months, conference organizers said security remains a big concern and an electronic link was therefore necessary.

2.   And security remains a formidable problem.

3.   Because security remains a concern, Stanley said he researched other lofty perches, including the Plexiglas-enclosed deck atop the Empire State Building in New York City.

4.   Border security remained at perhaps its most intense level in the history of the two countries.

5.   A spokesman at the nearby Hanford Nuclear Reservation also said security remains high, but declined to elaborate.

6.   But board members insist that school security should remain under their jurisdiction, and they have begun their own safety overhaul.

7.   But he said the intense security will remain for at least several days.

8.   But I would also build a cautious investment portfolio, relying heavily on fixed-income securities, designed to insure that the financial security remains.

9.   But the officials appeared to be girding for the possibility of further unrest and said the harsher security would remain in effect for a indefinite period.

10.   By early afternoon, the city was nearly deserted, but security remained on high alert.