Your weekly bonus episode of The Global Story. When OceanGate’s Titan submersible went missing last June, it sparked a monumental rescue mission which captured the attention of the world. After days of searching, authorities concluded that the vessel had suffered a catastrophic implosion, and that all five passengers died almost instantly. For the past two weeks, the US Coast Guard has been hearing testimonies from former employees and industry experts, to try to identify what went wrong. On this episode, Azadeh Moshiri is joined by the BBC’s science editor, Rebecca Morelle, to discuss the most revealing evidence, and consider whether the tragic event could have been avoided. The Global Story brings you trusted insights from BBC journalists worldwide, one big story every weekday, making sense of the news with our experts around the world. For more, go to bbcworldservice.com/globalstory or search for The Global Story wherever you got this podcast. We want your ideas, stories and experiences to help us understand and tell #TheGlobalStory. Email us at theglobalstory@bbc.com You can also message us or leave a voice note via WhatsApp on +44 330 123 9480. Producers: Laurie Kalus and Eleanor Sly Sound engineers: Phil Bull and Mike Regaard Assistant editor: Sergi Forcada Freixas Senior news editor: Richard Fenton-Smith

Today on The Sunday Story we feature an episode from the NPR podcast Planet Money about the inner workings of the residential solar industry and how the business practices of some companies have soured customers on the promise of this renewable energy. And the team looks into where the residential solar industry is headed in the future. Learn more about sponsor message choices: podcastchoices.com/adchoices NPR Privacy Policy