Parting Shot — Why Did the Bison Cross the Road — 3/27/07
A lone bison crosses a road ahead of a pack of snowmobilers in Yellowstone National Park, Wyo. in this Jfile photo. Snowmobiles would become a permanent winter fixture in Yellowstone National Park under a proposal released earlier today that would allow up to 720 of the machines in the park daily. (AP Photos/Craig Moore, file)
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