The main shipping channel into the Port of Baltimore, which had been blocked by the collapse of the Francis Scott Key Bridge, has been fully reopened after an 11-week effort involving over 2,000 people. The U.S. Army Corps of Engineers confirmed the channel's safety for transit at its original depth of 50 feet. The bridge collapsed when a container ship, the Dali, lost power and collided with it, causing the death of six workers. The cleanup operation involved a wide range of experts and equipment, including temporary channels for vessel traffic. The restoration of the channel has been celebrated by Maryland's governor as a step towards economic recovery. However, the reconstruction of the Francis Scott Key Bridge is expected to take four years and cost up to $1.9 billion.