And sometimes it’s enemy action.
Point being, WE DON’T KNOW.
The Cybersecurity and Infrastructure Security Agency report said the vessel, the Dali, had “lost propulsion” and officials in Maryland were notified about the situation, according to ABC News.
“The vessel notified MD Department of Transportation (MDOT) that they had lost control of the vessel and an allision with the bridge was possible,” the report said. “The vessel struck the bridge causing a complete collapse.”
https://nypost.com/2024/03/26/us-news/francis-scott-key-bridge-collapse-live-updates-latest-news/