Baltimore bridge collapse clean up

As salvage efforts are underway, the National Transportation Safety Board has been gathering evidence at the scene of the Baltimore bridge crash, interviewing witnesses and analyzing the ship’s data recordings.Two pilots who were tasked with guiding the ship out of port were expected to be interviewed by authorities Thursday. The vessel’s captain, his mate, the chief engineer and another engineer have already spoken to investigators, said NTSB chair Jennifer Homendy.Investigators have used audio and data from the 213-million-pound ship’s voyage data recorder to extract clues as to…