A distress signal was sent from the missing Titanic submarine as the race against time to rescue the five people on board continues.
Five people, including a British billionaire and father and son living in Surrey, crewed a submersible that delved nearly 4000m under the sea to visit the Titanic wreck.
But things took a distressing turn for the worse when contact with the sub was lost just 15 minutes from the famous ship's last resting place.
