On June 18, a small tourist submersible on an expedition to the wreckage of the Titanic went missing in the North Atlantic. The submersible, known as the Titan, was reportedly owned by a private U.S. subsea exploration company and could have carried up to five people. The U.S. and Canadian coast guards are searching the area. Let's go to the St. John's harbor in Newfoundland, Canada, where the submersible set off from before losing contact with surface crews.