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Happening now, the search for a missing underwater tourist vessel intensifies as banging noises are heard in the area again today.

We have experts standing by. They're tracking the desperate hunt for survivors of the expedition to see the wreckage of the Titanic.

This hour, the supply of oxygen in the submersible is rapidly running out.

We'll show you what conditions are like inside the small

cramped sub that left with five people on board. And China is now lashing out at

the United States after President Joe Biden referred to Chinese leader

Shizhin Ping as a dictator.

This, as CNN is getting an exclusive look at military drills preparing for a potential

Chinese invasion of Taiwan.

Welcome to our viewers here in the United States

and all around the world.

Well, Flitzers off today, I'm Alex, the source of banging sounds in the area that remains a mystery at this hour

But as CNN's Jason Carroll reports they are giving rescue crews hope

...