Article Photos: Feds: Lack of sea ice changes walrus behavior 1/3

  This July 17, 2012 photo released by the U.S. Geological Survey shows adult female walruses on an ice floe with their young in the U.S. waters of the Eastern Chukchi Sea in Alaska. The absence of vast swaths of summer sea ice is changing the behavior of Pacific walrus, federal scientists said Wednesday, but more research is needed to say what the final effects might be. (AP Photo/U.S. Geological Survey, S.A. Sonsthagen)