This undated photos shows the Arctic National Wildlife Refuge in Alaska. (Photo by U.S. Fish and Wildlife Service/Getty Images)

Clouds hover over snowy peaks near Prince Willam Sound on March 31, 2004 near Valdez, Alaska. (Photo by David McNew/Getty Images)

Mist hovers near the former copper mining and fishing village of Ellamar in Prince Willam Sound on April 4, 2004 near Valdez, Alaska. (Photo by David McNew/Getty Images)