1.   A snowstorm grounded the helicopters of the wealthy and turned the road snaking up from the valley into a white-out.

2.   But fog kept their helicopters grounded, and the meeting was held at the Waldorf-Astoria Hotel on Park Avenue.

3.   But in May, the appellate court in effect grounded the helicopter, ruling in favor of the town.

4.   Dense smoke often grounds government helicopters, forcing firefighters to slog for hours across mountainous terrain to reach fire lines.

5.   The restrictions haveraised concerns among some pilots that tougher measures should be taken, such as grounding the helicopters, until the problem can be fixed.

6.   The smoke pouring from out-of-control fires in southern Mexico has grounded firefighting helicopters, hampering efforts to combat the blazes, U.S. officials said yesterday.

7.   Virtually all country roads in the region have been washed out, and a vengeful fog had grounded helicopters.

8.   Whatever the reason, commercial jets are flying, but traffic planes and news helicopters are still grounded.

9.   Winter fog often grounds helicopters.

10.   Poor visibility grounded helicopters.