egetation through time," says Orr. The Range View Web site provides applications for viewing, animating, and analyzing satellite images to monitor vegetation dynamics through time and across landscapes. The site also offers a step-by-step tutorial for new users. The database can be used to find answers to a variety of questions. Hitting the "animate" button to see two-week variations in vegetation over the past year, for example, enables users to assess fire potential or other time-depend- ent applications. To orient themselves, viewers can look at the location of towns, roads, grazing allotments, and other features. "Our members are SO familiar with the land. When you get them looking at a view of it from space, they forget they're using a computer mouse and want to get that cursor arrow on their ranch," says Doc Lane, director of natural resources for the Arizona Cattlemen's Association and Arizona Wool Producers Association. "You'd be amazed how quickly people forget they're using a computer and connect directly with their ranch on the screen." Resolution on the satellite images is one square kilometer, enough to show vegetation color without violating people's privacy. Hutchinson says the capa- bility of the site is somewhere between weather information that is not very site-specific and field monitoring that is quite site-specific. "This is something in the middle that can bridge those two scales." Range View images are avail- able for the entire United States, southern Canada, and northern Mexico. 6.8 SEEING INSIDE WALLS The building community soon may have radio vision-a new way to "see" moisture inside walls. Building researchers at the National Institute of Stan- dards and Technology (NIST) have joined forces with Intelligent Automation SOMETHING IN THE AIR-RADIO AND LOCATION TECHNOLOGIES Inc. in Rockville, Maryland, to develop a way to use ultra-wide-band radio waves to nondestructively detect moisture within the walls of a building. As any homeowner who's suffered with leaky plumbing or mold problems w