1.   Smoke obscured his view Thursday.

2.   The flames rose up on both sides of the road like a tidal wave, and smoke obscured all but a few feet of road, he said.

3.   The smoke of battle obscured the fact that Clinton was following through on his New Covenant notion of welfare reform and not merely acceding to a punitive rollback.

4.   For days, smoke had obscured landmarks, including the opera house and bridge, which was used as a launching platform for hundreds of skyrockets.