The chair of the National Transportation Safety Board told several members of Congress Wednesday morning that her team remains in Baltimore investigating the Key Bridge collapse, and they are focusing on the electrical system of the Dali, the cargo ship that slammed into the bridge two weeks ago. "We have had the manufacturer of equipment in the engine room to look closely at the electrical power system. We're continuing to look at that. We've asked for additional assistance from the manufacturer who returned from overseas this week with experts to look at the circuit breakers," NTSB Chair Jennifer Homendy told lawmakers.