and relatives of the surrey businessman shahzada dawood and his 19 year old son, suleman, described their unimaginable loss . the other two men on board were the former french navy diver and renowned explorer paul henri nargeolet and the ceo of oceangate, stockton rush. the us navy has said it detected sounds consistent with an implosion shortly after the sub lost contact. search teams found debris from the sub thousands of metres below the surface of the atlantic ocean. it ends an international five day search for the submersible, which had been on an expedition to the wreckage of the titanic. our north america correspondent nomia iqbal has been following the developments. after days of searching, officials have discovered the remains of the oceangate submersible near to the site of the titanic wreck, bringing this story to a tragic end. the titan submersible