BALTIMORE (AP) — A cargo ship lost power and rammed into a major bridge in Baltimore early Tuesday, destroying the span in a matter of seconds and plunging it into the river in a terrifying collapse that could disrupt a vital shipping port for months. Six people were missing and presumed dead. The ship’s crew issued a mayday call moments before the crash took down the Francis Scott Key Bridge, enabling authorities to limit vehicle traffic on the span, Maryland’s governor said. The ship struck one of the bridge’s supports, causing the structure to collapse like a toy. A section of the span came to rest on the bow of the vessel, which caught fire, and thick, black smoke billowed out of it. With the ship barreling toward the bridge at “a very, very rapid speed,” authorities had just enough time to stop cars from coming over the bridge, Maryland Gov. Wes Moore said. “These people are heroes,” Moore said. “They saved lives last night.”