What really happened when the container ship M/V Dali struck the Francis Scott Key bridge and, it immediately collapsed, destroying not only a key bridge but maiming or killing at least eight people? We will look at what happened based on what we know now of the facts and the timeline. I know there is a lot of speculation out there about the root causes and the national transportation safety board investigation team is currently on the scene combing through all the information and data. Unfortunately there are some issues with the unified command structure that’s been set up to handle the incident and we’ll talk about the potential consequences. I’ve said it before, nothing should be ruled out until a thorough and competent incident investigation is completed. My guest today is Professional Mariner and Offshore Towing expert and US Coast Guard veteran Matthew Caldwell.