Sheep Drives Squeeze Between Old West And New West his is the time of year ranchers move sheep by the tens of thousands from the mountains to lowland pastures. In the inland Northwest, sheep drives can cross over a hundred miles by foot. But land that used to be open range is gradually turning into subdivisions, golf courses, and busy streets. In one central Idaho valley, ranchers have a colorful way to win newcomers over to sharing the land. Correspondent Tom Banse reports they drive their sheep right down the center of swanky Ketchum-Sun Valley. Brothers Mike and Mark Henslee are walking with about a thousand sheep. They started high in the Stanley Basin of central Idaho and plan to wind about 150 miles south to warmer pastures near the Snake River. Along the way, they have somehow to slip all those sheep through the eye of a needle, otherwise known as fashionable Sun Valley....