U.S. Coast Guard Chief Warrant Officer Aaron Bisig, marine inspector for Sector Detroit’s Prevention Department, informs members of the Great Lakes Marine Firefighting Task Force about the dangers of fuel transfers at the Marathon Petroleum – Detroit Refinery, Detroit Michigan, April 29, 2025. Bisig taught during the GLMFF-TF workshop to aid in the preparedness of first responders on the Great Lakes. (U.S. Coast Guard photo by Petty Officer 3rd Class Mary Wysong) (This image has been modified to enhance the subject.)