Georgia and South Dakota recently became the latest to offerpeople with mobility impairments free access to motorizedall-terrain wheelchairs at some public parks and sites. Equippedwith tank-like treads, Georgia's chairs can traverse rocks, mud,tall grass, and streams, and can even navigate through snowand over some fallen trees. News & Trends ENVIRONMENT Exploring rugged park trails has long been a challenge for thosewith physical disabilities, but it's getting easier in some states. [Extracted from the article]