11.   The police, wearing gas masks and using heavy shields, formed a line to push the protesters back and fired tear gas at them.

12.   The Pentagon has previously accused Iraq of using human shields to protect weapons, knowing that U.S. and British pilots operate under strict guidelines intended to avoid killing civilians.

13.   When correction officers pass the segregation cells with other prisoners, they use a shield of plexiglass to protect themselves and the inmate.

14.   Police used riot shields to form a barricade, and several light scuffles resulted when distraught family members tried to break through to the collapse site.

15.   Police used riot shields to shove the demonstrators into an alley.

16.   After a similar demonstration last week, protesters clashed with riot police using shields to dodge gasoline bombs and rocks.

17.   Another line of riot police used shields to push back hundreds more who had marched down a side street.

18.   At one point, angry officers used plastic shields to smash the windows of a van owned by the labor group.

19.   But shortly before midnight, hundreds of police in full riot gear used their shields to begin pushing the protesters away.

20.   From time to time, Israeli soldiers, using plastic shields to protect against a hail of rocks, charged forward to push back the crowd.