11.   As a result, parks officials drew up a less sweeping set of regulations that were released Wednesday.

12.   As the impasse continued, park service officials said they could no longer ensure the safety of park visitors.

13.   At Ellis Island, park officials have become resigned.

14.   At one point, park officials and their families were forced to flee homes and offices at the headquarters in Mammoth.

15.   At the dinner, park service officials presented Chelsea with a commemorative Smokey Bear doll, and she refused to leave until learning where to mail a thank-you note.

16.   Big Bend park officials have had to cancel nature and environmental classes for Mexican children.

17.   Both are bad ideas, say park officials and climbers, that would neither make climbing any safer or rescue operations any more efficient.

18.   A decade ago, park officials kept trees and bushes neatly groomed, but rangers successfully lobbied for a more natural look.

19.   A musical duel erupted in March when park officials silenced the loud music that kept the circle spinning.

20.   A dilapidated shack, which park officials intended to remove, also washed away.