Michael Kong and Kevin Taylor guide a water testing unit onto the deck of the Professor Khromov in the Bering Strait 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 (UNITED STATES ENVIRONMENT SCI TECH)