BALTIMORE — Crews set off a chain of carefully placed explosives Monday to break down the largest remaining span of the collapsed Francis Scott Key Bridge in Baltimore, and with a boom and a splash, the mangled steel trusses came crashing down into the river below.

In footage shared by the Port of Baltimore Authority, a dramatic plume of smoke rises after a loud bang. The steel structure breaks and folds into itself before falling into the water. The ship's crew remained on board throughout the operation and was unharmed.