Claudia meets Professor Elizabeth Stokoe author of 'Crisis Talk' whose research shows when preventing a suicide, that words really do matter and can save lives during a crisis. Through analysing real time recordings of actual conversations between people in crisis and police negotiators, new findings highlight what can work and what doesn't. (Picture: Vector illustration of two profiles of women with speech bubbles inside their heads. Photo credit: JakeOlimb/Getty Images.) Presenter: Claudia Hammond Producer: Erika Wright