While the following story didn't occur here in the United States, it did involve an American-owned cruise ship. The "Seabourn Encore" drifted into a cement carrier in the Port of Timaru in New Zealand recently. The source story is light on details, so it is unclear if the cruise ship was in operation at the time or if it was docked and simply drifted on its own. What is known, though, is that the cruise ship collided with another.
Local officials launched an inquiry into the accident and ultimately cleared the cruise ship to continue operating. It left the port later that night after the accident. Investigators talked to crew members, but it appears that nothing was out of the ordinary.