Coast Guard National Strike Force members, with support from Coast Guard Cutter Healy deck crewmembers, prepare to lower a self-propelled Arctic oil skimmer for a test evolution in the Bering Sea northwest of St. George, Alaska, July 24, 2017. The Coast Guard Research and Development Center performs oil spill response research and regularly conducts trials of new technology to identify potential equipment for oil spill response in a variety of conditions, including Arctic ice. U.S. Coast Guard photo by Senior Chief Petty Officer Rachel Polish