A conversation about risk and resurgence. Barrett is the co-author of Extreme: Why Some People Thrive at the Limits, which examines what we can learn from people who embrace high-risk work and life and are attuned to survival. Sian Williams, one the nation’s most trusted broadcasters, is also a trauma assessor. She is the author of Rise: Surviving and Thriving After Trauma (embargoed until 30 May).