Answer:When the long white truck drove through Roosevelt Arch on Jan. 12, 1995, it was almost like watching a modern-day Trojan horse arrive in Yellowstone.
Inside were eight gray wolves from Jasper National Park in Alberta, Canada. They became the first wolves to roam Yellowstone since the 1920s when the last pack was killed. By the end of 1996, 31 wolves were relocated to the park.
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