NTSB Probes Dual Blackouts Leading to Fatal Baltimore Bridge Collapse

Preliminary report outlines sequence of electrical failures on the cargo ship Dali before it struck the Francis Scott Key Bridge, killing six workers.

The Dali experienced two blackouts during maintenance before leaving the Port of Baltimore.
A second series of power outages occurred just before the ship struck the bridge.
The collapse killed six construction workers and led to an ongoing FBI investigation.
NTSB's full investigation could take over a year to complete.
Efforts to refloat the ship and clear the bridge wreckage are underway.