11.   Also, the latest estimate included the Martin Luther King holiday, when state unemployment offices were closed, preventing workers from filing.

12.   But church leaders say state authorities ignored warnings of the attack and Red Cross officials say security forces prevented medical workers from entering the hamlet as the slaughter continued.

13.   But critics of the proposal said that provision would not be enough to prevent temporary workers from remaining in the United States.

14.   But opponents of the labor ban point out that minimum wage laws in Western Europe would prevent workers from the East from driving down salaries.

15.   But the trucks spewed exhaust, which had to be removed to prevent workers from choking on the fumes.

16.   By repeatedly issuing gloomy pronouncements on the talks, Shoemaker has put pressure on GM to settle while also preventing workers from raising their hopes, these people said.

17.   Claims have been distorted during the holiday season because state government offices close, preventing workers from filing.

18.   Critics of a confidential system of reporting contend that it would prevent health workers from notifying current or former sexual partners that they may face the risk of infection.

19.   Floods in the Red River Valley in North Dakota have forced thousands of people to evacuate the area, and that prevented some workers from filing for new claims.

20.   Floods and snow storms in the West may have prevented some workers from filing last week.