81.   But as Barkley leads the Suns into the playoffs for the fourth time, there still is uncertainty about his future.

82.   But Digital lacked the marketing clout to develop a mass market for Alpha-based computers and sales faltered during the Compaq takeover because of uncertainty about the future.

83.   But despite the uncertainty about their futures, the mood among the marchers was upbeat.

84.   But even they acknowledge uncertainty about what their own legacy will be.

85.   But given the uncertainties about market valuations and the state of the economy, analysts said, it was not altogether surprising the pace of business has slowed.

86.   But because that discovery was made by a different method, there is a greater uncertainty about its size and distance, Burrows said.

87.   But given the uncertainties about benefits and the relatively high frequency of false positives, the decisions of individual women about mammography may understandably differ.

88.   But he does not expect uncertainty about his future to cause a distraction in the locker room.

89.   But he seems to have miscalculated American uncertainty about whether immigration helps or hurts.

90.   But he said their brand of excitement has sustained him through grueling hours of fund-raising, and weeks of uncertainty about his prospects for the ballot.