Yesterday, a reader of The War Zone happened to look outside their office overlooking the Port of Miami and see what appears to have been an interesting inter-agency training exercise. Unlike some drills that have occurred in and around major U.S. metropolitan areas, this one, which included a UH-60M Black Hawk very similar to one that appeared over Chicago this past September and specialized stealth boats, seems to have gone largely unnoticed.
http://www.thedrive.com/the-war-zone/25458/commandos-ride-black-hawk-helo-and-stealth-boats-during-shadowy-exercise-in-miami-port