Bringing the wolves back to the Rockies has been a huge success story. So why are we allowed to gun them down?May. 27, 2008 | In Yellowstone National Park's Lamar Valley, the return of gray wolves has turned the wild canines into celebrities. At dusk, scope-toting wildlife watchers and photographers stake out the valley to observe the crepuscular predators. One of the most popular wolves in the valley, known to wildlife biologists as 253M, won the affectionate nickname Limpy, because of a pronounced limp from an injury. Born to the Druid Peak pack, Limpy was wounded in a fierce fight...