51.   And that along with uncertainty about the future could change society as we know it, says Steve Prothero, religion professor at Boston University.

52.   And the number of passengers has plunged since the attacks, creating uncertainty about just what the future needs will be.

53.   And though he plans to be in camp by Friday, according to agent Jim Bronner, there is some uncertainty about whether he can join workouts.

54.   Apple has been struggling against customer concerns about quality, confusion over its product line and uncertainty about its operating strategy.

55.   As a result, many boards are virtually paralyzed by uncertainty about just what their role should be.

56.   As for Deak, the uncertainties about electronic contracts are not holding him back from making deals online.

57.   Aside from memories of those who died, the biggest concern for many survivors is the nagging uncertainty about what comes next.

58.   At least one juror said later that the uncertainty about where the death had occurred had been a factor in his decision to acquit Kevorkian.

59.   At the same time, high unemployment, wage stagnation and uncertainty about future changes to taxes and pensions have depressed consumer spending.

60.   At the same time, there was general uncertainty about where the downturn might end.