Dr. Sanjay Gupta sits down with author Jonathan Gluck to discuss his new book, “An Exercise in Uncertainty: A Memoir of Illness and Hope,” and what two decades of living with cancer have taught him – and might teach us – about living well. Listen to the full episode on CNN's Chasing Life podcast: swap.fm/l/clfeyt103125 #cnn #news #health #cancer #survival #medicine #hope #optimism #uncertainty #author #books #memoir #writing #writer