Crews are working to remove the first portion of Baltimore bridge wreckage – the starting point in a complicated, extensive cleanup process that could help open up a temporary channel to get more vessels into the water around the collapse site, officials said. Clearing the channel will allow the search for the missing victims to continue and reopen a port critical to the local and national economies, authorities said Saturday. In the meantime, conditions in the water make it unsafe for divers as pieces of the bridge remain submerged in the water.