1.   ...paving stones and bricks which have been thumping down on police shields and helmets.

2.   Endeavour is carrying a cache of U.S. flags and New York City police shields as a tribute to those who lost their lives in the attacks.

3.   Jorge said he was paid in cash by a boss who drove a Lincoln Continental with tinted windows and an anti-narcotics police shield.

4.   Some of the vehicles carried police riot shields.

5.   Some demonstrators threw themselves against the thick transparent police shields and were knocked to the ground.

6.   Protesters pounded metal pipes on the police shields.

7.   Despite protection from police shields, the crowd pelted Dobrev with snowballs as he entered parliament.

8.   It is the police shield of a man named George Howard, who died at the World Trade Center trying to save others.

9.   Others broke the concrete sidewalk into fist-sized rocks and threw them at police carrying shields.

10.   Pulling scarves over their faces to avoid identification, the youths charged police, ripping side mirrors off one armored car and firing rocks and bottles against police shields.