1.   This paucity of information arises from the role that uncertainty has in quantum mechanics.

2.   But political uncertainty has put deal-making on hold for the past six months.

3.   But the uncertainty has had an effect.

4.   That uncertainty could have a significant impact on employers as they struggle to recover from their financial shortcomings.

5.   That uncertainty has some analysts a bit uneasy.

6.   That uncertainty has frustrated Rep. Jay Inslee, D-Wash., who has sponsored one of the pipeline bills.

7.   That uncertainty is having its effect in the muni market.

8.   The marketplace uncertainties have multiple sources.

9.   The uncertainties have to do with political will rather than military abilities.

10.   The uncertainty has workers worried.