Saudi activist rejects release deal tied to denying torture. Commonwealth on 'high alert' for possible repeat of Murray-Darling. US on the brink of recession tumbles global sharemarkets. Mother of silicosis victim speaks out. Sport with Warwick Hadfield. Govt urged to bring forward more infrastructure funding. Politics with Michelle Grattan. Scott Morrison challenges climate change at Pacific Islands meeting. Australia's prison population fuelled by returning prisoners. Native bush foods could help address climate change. Science with Jonathan Webb: Brazil's 'super-deep' diamonds. Bek-Jean Stewart releases fifth studio album.