The salvage crews are working against the clock to remove debris from the collapsed Francis Scott Key Bridge in Baltimore, with over 1,000 tons of steel already recovered and four bodies found. The FBI has launched a criminal probe into the bridge collapse, focusing on the cargo ship Dali and any potential violations of federal maritime law. The operation aims to open a temporary channel in the harbor to resume commercial traffic, with plans to reopen the port's main channel by the end of May.