** FILE ** Elk roam among the homes outside the east entrance to Rocky Mountain National Park in Estes Park, Colo., in this file photograph taken, Dec. 13, 1998. Colorado's top wildlife officer said Thursday March 8, 2007 he is optimistic that licensed hunters, rather than park employees firing guns with silencers, will be used to thin the burgeoning elk herd that is overgrazing and damaging habitat in Rocky Mountain National Park. (AP Photo/David Zalubowski, file)