The National Transportation Safety Board held a press conference to update on their investigation into the cause of the ...

It was expected to begin at 4 p.m. but has since then been rescheduled for 5:30 p.m. Once it begins, a streaming of the presser will be added to this story.

The agency’s decision, made shortly after Wednesday’s deadly collision, was framed by the transportation secretary as an important step toward enhancing safety.