Yellowstone begins bison captures as it seeks to cull herd

Yellowstone National Park has started capturing bison migrating outside the park and will hold them in pens for possible slaughter as part of a population reduction program, officials said Monday.The annual operation began Sunday and by mid-day Monday six bison had been captured as they entered the Gardiner Basin along the Yellowstone-Montana border, park spokeswoman Linda Veress said.State and federal officials want to reduce Yellowstone's bison herds by up to 900 animals this winter under an a