NASA’s mega-rocket lunar mission is go for launch!The BBC's science editor Rebecca Morelle explains everything you need to know about the American space agency’s latest Moon mission. Also, Newsnight’s UK Editor Sima Kotecha and BBC Kent political reporter Michael Keohan discuss why a new 24-hour record has been set for migrant crossings on the English Channel. And Isabel Hilton from ChinaDialogue.net describes the repercussions of China’s most intense heat wave on record. Today’s episode was made by Tim Walklate with Clare Williamson and Natalie Ktena. The technical producer was Hannah Montgomery. The assistant editor was Sam Bonham.