A firefighting helicopter flies fills a bucket of water in heavy smoke from the North Merna wildfire in Sublette County Wyoming west of town of Pinedale in the Jim Bridger National Forest

A firefighting helicopter flies fills a bucket of water in heavy smoke from the North Merna wildfire in Sublette County Wyoming west of town of Pinedale in the Jim Bridger National Forest September 16, 2012. REUTERS/Jim Urquhart (UNITED STATES)