https://apnews.com/article/titan-submersible-investigation-91bde867ef100c769f1dbe293f2b3020 > An international group of agencies is investigating the loss of the Titan submersible, seeking to determine what caused it to implode while carrying five people to the Titanic. > Investigators from the U.S. Coast Guard, the U.S. National Transportation Safety Board, the Transportation Safety Board of Canada, the French marine casualties investigation board and the United Kingdom Marine Accident Investigation Branch are working closely together on the probe of the June 18 accident that drew worldwide attention.