Unlike other American astronauts, Virgil I. "Gus" Grissom never had the chance to publish his memoirs. Killed along with his crew in a launch pad fire on January 27, 1967, Grissom also lost his chance to walk on the moon and return to describe his journey. Others went in his place. The stories of the moon walkers are familiar. Less appreciated are Grissom's contributions. The international prestige of winning the Moon Race cannot be understated, and Grissom played a pivotal and enduring role in securing that legacy for the United States. Indeed, Grissom was first and foremost a Cold Warrior, a member of the first group of Mercury astronauts whose goal it was to beat the Soviet Union into space and eventually to the moon. Drawing on extensive interviews with fellow astronauts, NASA engineers, family members, and friends of Gus Grissom, George Leopold delivers a comprehensive and corrective account of Grissom's life that places his career in the context of the Cold War and the history of human spaceflight. Calculated Risk: The Supersonic Life and Times of Gus Grissom adds significantly to our understanding of that tumultuous and ultimately triumphant period in American history.