21.   While recognizing that she can be an asset, the royal family is said to favor limiting her visibility.

22.   A cloud of ash and sand shrouded the city, limiting visibility.

23.   Ash and sand shrouded the city, limiting visibility.

24.   Fog hung over Chechnya most of the day, limiting visibility and making accurate bombing impossible.

25.   Fog hung over Chechnya most of Thursday, limiting visibility and making accurate bombing impossible.

26.   Fog hung over all of Chechnya, limiting visibility and making accurate bombing difficult.

27.   Heavy snow limited visibility.

28.   Light fog still hung over Chechnya and its capital Thursday, limiting visibility and making accurate bombing difficult anyway.

29.   Organizers said they stopped the biathlon because heavy snow and fog limited visibility.

30.   Smoke limited visibility to about a foot on Card Sound Road, and state troopers closed it for just over three hours, isolating the island chain.