Julie Gascon, Assistant Commissioner of the Canadian Coast Guard Central and Arctic Region and Rear Adm. Joanna Nunan, commander of the United States Coast Guard Ninth District, sign a renewed Memorandum of Understanding (MOU) on icebreaking services for the Great Lakes and St. Lawrence Seaway, Jan. 18, 2018. U.S. Coast Guard courtesy photo. CLEVELAND — Rear Admiral Joanna Nunan, Commander, United...