Piers Morgan has slammed vicious online trolls mocking the nail-biting Titanic submarine rescue mission.
A frantic search and rescue operation is underway for the Titan, a tiny submersible vessel, which has been missing since Sunday.
It lost communication contact with its support ship just short of two hours after submerging, and those onboard - British billionaire explorer Hamish Harding, Paul-Henri Nargeolet, Stockton Rush, Shahzada Dawood and his son Suleman - have hours of oxygen left.
