July/August 2002 
Counting on Sheep
For decades, wildlife biologists and park rangers at Canyonlands and other Southwest parks have worked to restore desert bighorn. These efforts represent a great success story, although the animals' continued recovery is far from ensured.
By Jeffrey Cohn
A Finger on the Pulse
NPCA's State of the Parks program assesses the overall health of the national parks by analyzing scientific data on the condition of a park's natural and historic resources. The goal is to provide information to policy-makers and the National Park Service that will improve conditions.
By Kim A. O'Connell
Preserving the Peace and Quiet
The dull roar of progress and its machines is overwhelming the ambient sounds of nature in the parks and harming wildlife in the process. The Park Service and environmental groups are working to restore the soundscape, as important to an ecosystem—and our own well-being—as clean air and water.
By Brian Lavendel
Outlook
The Bush administration has not done enough to obtain clean air over national parks.
By Thomas C. Kiernan
Letters
ParkScope: News and Notes
Zion's cottonwoods could soon vanish
Marine reserves at Virgin Islands likely
Cape Hatteras lighthouse remains closed
Sand Creek site donated to Indians
Bald eagle returns to Channel Islands
PWCs banned from most of park system
NPCA Notes
Regional Report
Historic Highlights
Roger Williams National Memorial
By Ryan Dougherty
Forum
Yosemite Valley provides a perfect place to study the National Park Service's challenge to maintain a balance between enjoyment and preservation.
By Bob R. O'Brien
Excursions
A grand tour through the Southwest
By William A. Updike
Rare & Endangered
The Hibiscadelphus giffardianus
By Jenell Talley
