Poker is a game of risk. The chances you take, the bets you make, determine the loss, or the reward. It’s a heated calculus of quick decision-making, gut instinct, and strategy. This week, on the second episode of the Risk mini-series on No Turning Back, Stan and Chris speak to Annie Duke, a former professional poker player whose titles include the NBC National Poker Heads-Up Championship, as the World Series of Poker Tournament of Champions.