Investigation into Baltimore bridge collapse picks up speed as divers search for missing workers

abcnews.go.com:

Investigators are collecting evidence from the cargo ship that plowed into Baltimore’s Francis Scott Key Bridge and caused its collapse

BALTIMORE — Investigators began collecting evidence Wednesday from the cargo ship that plowed into Baltimore’s Francis Scott Key Bridge and caused its collapse, while in the waters below divers searched through twisted metal for six construction workers who plunged into the harbor and were feared dead.

The investigation picked up speed as the Baltimore region reeled from the sudden loss of a major transportation link that's part of the highway loop around the city. The disaster also closed the port that is vital to the city's shipping industry.

Officials with the National Transportation Safety Board boarded the ship and planned to recover information from its electronics and paperwork, NTSB Chair Jennifer Homendy said.

The agency also is reviewing the voyage data recorder recovered by the Coast Guard and building a timeline of what led to the crash, which federal and state officials have said appeared to be an accident.

The ship’s crew issued a mayday call early Tuesday, saying they had lost power and the vessel's steering system just minutes before striking one of the bridge’s columns.

At least eight people went into the water. Two were rescued, but the other six — part of a construction crew that had been filling potholes on the bridge — were missing and presumed dead.

The debris complicated the search, according to a Homeland Security memo described to The Associated Press by a law enforcement official. The official was not authorized to discuss details of the document or the investigation and spoke to AP on condition of anonymity.

Maryland Gov. Wes Moore said the divers faced