Titanic sub: '20 hours of oxygen left'

Rear Admiral John Mauger from the US Coast Guard has told BBC News that the crew on board the Titanic submersible may have less than 20 hours of oxygen left, based on the initial estimate of 96 hours. We hear from someone involved in the rescue operation.

We also hear from a man in the US who, after an accident at sea, was lost at sea for 76 days but survived.

At least 41 people have been killed in a riot at a women's prison in Honduras on Tuesday. Our Latin America editor tells us more.

Iceland has suspended its annual whale hunt in a move that could mean an end to the controversial practice. We explain the practice and hear reaction from Iceland.

We hear about evidence the BBC has found that Britain sent hundreds of mentally ill or long-term sick migrants back to the Caribbean between the 1950s and the early 1970s.

And we learn more about the killing of Hardeep Singh Nijjar, president of a Sikh temple in Canada, found fatally injured in car park.

(Photo: The Titan submersible, operated by OceanGate Expeditions to explore the wreckage of the sunken SS Titanic off the coast of Newfoundland, dives in an undated photograph. Credit: OceanGate Expedition via Reuters)