Baltimore bridge collapse: Expert view on what happened
In the early hours of Tuesday morning, a cargo ship leaving the US city of Baltimore catastrophically struck a major bridge. The entire middle section of the 1.6-mile-long Francis Scott Key Bridge collapsed into the Patapsco River.
The ship lost power as it left the port, but the crew had enough time to make a mayday call so officials on the bridge were able to shut it to most traffic. Two people were rescued from the water but several people are still missing.
There are now questions about how such a large vessel lost control and how the huge structure of the bridge crumbled so quickly.
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