Researcher Shawnee McMillian, from the Center for Freshwater Research and Education at Lake Superior State University, discusses her work with Ninth District Commander Rear Adm. Michael Johnston during an opening celebration for the Coast Guard's Great Lakes Center of Expertise Aug. 24, 2022. The Great Lakes Center of Expertise, which examines the impact of freshwater oil spills and their responses, is based at the Center for Freshwater Research and Education. U.S. Coast Guard photo by Chief Petty Officer John Masson.