[ad_1] “Hold all traffic on the Key Bridge.” The terse command from an officer in Baltimore’s busy commercial shipping port was one of the first warnings of a disaster that experts now predict will transform shipping on the Eastern Seaboard and change how ships and Key bridges function around the world. But after the cargo ship Dali lost power early Tuesday, there were precious few minutes to act. In those minutes, many people — from the ship’s crew, who sent out a mayday signal, to the transportation authority police officers,…