Titan Sub Rescuers Still Searching For Mysterious Knocking Sound As Sub's Oxygen Supply Dwindle
Earlier this week, a submarine full of tourists disappeared while on a trip to the wreckage of the Titanic. The sub was equipped with 96 hours of oxygen, meaning rescuers are racing against the clock to locate the missing sub and save its occupants from watery, claustrophobic hell. The latest update? They’re still…