Dan Naber prepares an anchor to drag the sea floor in hopes of releasing stuck data gathering equipment in the Bering Strait on board the Russian research vessel Professor Khromov August 25, 2009. The equipment was retrieved and eight new data gathering moorings on both the Russian and the U.S. side of the strait were released to sea bed. 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. To match feature USA-RUSSIA/ENVIRONMENT REUTERS/Jeffrey Jones (UNITED STATES SCI TECH ENVIRONMENT)