Interesting how nobody in the media is pointing out that if anybody was still ALIVE in the Ocean Gate submarine, they would have manually dropped the ballast weights and the craft would have already floated to the surface. That's the emergency procedure that all occupants are briefed on. If nobody dropped the weights, almost surely nobody is still alive. And that points to catastrophic hull failure as the most likely scenario at this point. They didn't "run out of oxygen," they were crushed by hundreds of thousands of PSI of sea water imploding the hull. Hope I'm wrong, but that's what the evidence points to right now...