Photos from the wharf in St. John’s, Newfoundland, show what appeared to be several pieces and twisted chunks of the submersible. The debris will be further analyzed and tested as part of the investigation into why the vessel imploded. The investigation, which involves several government agencies from the United States and Canada, is being led by the U.S. Coast Guard. Coast Guard officials said the debris was “consistent with catastrophic loss of the pressure chamber” in the submersible. US Coast Guard leads Titan investigationOn Sunday, the Coast Guard announced it was leading the investigation into the loss of the submersible.