1.   Police also will have a helicopter crew looking for trouble from the sky, and locked barricades to keep pedestrians out of certain areas.

2.   Yellow barricades, some draped across flower beds, keep pedestrians away from ground-floor windows.

3.   Fences will be put up to keep pedestrians away from the danger zones.

4.   Late Tuesday, despite temporary barricades designed to keep pedestrians on the sidewalk, crowds poured into the street.

5.   Late Tuesday, despite temporary metal fences designed to keep pedestrians on the sidewalk, crowds poured into the street.

6.   Police roped off areas around threatened buildings to keep pedestrians away.