 And an expedition is setting sail on a trip to explore the wreck of the Titanic for the first time since the Titan submersible disaster last year. A company called RMS Titanic will use unmanned robots to visit the ocean liner. James Pence is a researcher for the firm. There's a lot of mystery surrounding parts of Titanic, such as the bow, how deep it is under that sediment. Will this be able to give us that answer? So a lot of potential with that. I'm Jonathan Fruin at the BBC in London.