The island of Big Diomede sits in the morning mist on the Russian side of the Bering Strait as seen from the Russian research vessel Professor Khromov August 28, 2009. A joint U.S.-Russian oceanographic expedition, the Russian-American Long-term Census of the Arctic (RUSALCA), is studying the impact of climate change on the waters from Alaska's coast to Russia's eastern tip. Picture taken August 28, 2009 To match feature USA-RUSSIA/ENVIRONMENT REUTERS/Jeffrey Jones (RUSSIA SCI TECH ENVIRONMENT)