It’s not Vieques, and it’s not Kaho’olawe. It’s Duluth, Whitefish Bay, and others. From the excellent blog of Dave Dempsey:

I was just informed about the proposal by the Coast Guard to establish 26 areas in the Great Lakes for “live fire gun exercises” to be conducted. Comments are due AUGUST 31. The exercises would be for one 2 to 3 day event per year (not clear if that means per area or for all the areas). The focus appears to be to try to assure that vessels are excluded from these areas when the exercises are on, but the proposal involves a categorical exclusion for environmental impacts. Some of the areas being identified include the major or significant migratory pathways in the region — Whitefish Bay in Lake Superior, Saginaw Bay, Duluth, Grand Marais, Thunder Bay, etc.