https://apnews.com/article/missing-titanic-submersible-updates-e1a3c77003a5ab6bf32818d80877a712 > Authorities from the U.S. and Canada began the process of investigating the cause of the fatal Titan submersible implosion even as they grappled with questions of who was responsible for determining how the tragedy unfolded. > A formal inquiry has not yet been launched because maritime agencies are still busy searching the area where the vessel was destroyed, killing all five people aboard, the U.S. Coast Guard said Friday. Debris was located about 12,500 feet (3,810 meters) underwater, several hundred feet away from the Titanic wreckage it was on its way to explore.