FILE PHOTO: A polar bear keeps close to her young along the Beaufort Sea coast in Arctic National Wildlife Refuge, Alaska in a March 6, 2007 REUTERS/Susanne Miller/USFWS/handout/File Photo/File Photo
FILE PHOTO: A polar bear keeps close to her young along the Beaufort Sea coast in Arctic National Wildlife Refuge, Alaska in a March 6, 2007 REUTERS/Susanne Miller/USFWS/handout/File Photo/File Photo