11.   All across midtown Manhattan, anxious drivers navigated a labyrinth marked off by blue police barriers.

12.   But children, tens of thousands of them pressed against police barriers, seemed to outnumber the grown-ups.

13.   But just as obviously, they are not going to be able to fence their prosperity safely behind police barriers.

14.   But police barriers kept them from getting a real view of the now-filled-in sinkhole.

15.   In Omagh Monday afternoon, several hundred people milled around and talked quietly near the police barrier that blocked the way to Market Street, where the bomb exploded.

16.   Late in the morning, there were TV crews and assembled hecklers standing behind police barriers at two hotel entrances.

17.   Organizers say that demonstrators intend to lie down in streets or lock themselves to police barriers or one another.

18.   Police barriers of concrete and orange plastic make it look like a war zone.

19.   Straining against police barriers, they chanted angry slogans and waved cardboard placards.

20.   The next day, residents lined a police barrier to catch a glimpse of the wrecked building.