Reuters: A controversial land swap proposal could open portions of an Alaska wildlife refuge to oil drilling, dividing Alaska natives and stoking opposition from environmentalists seeking to protect the bears, moose and birds that live there. Supporters of the plan to exchange land in the Yukon Flats National Wildlife Refuge, which lies just south of the more-famous Arctic National Wildlife Refuge, say they would like the plan to be approved by the administration of US president George W. Bush …