When the Challenger space shuttle exploded a little over a minute after its launch in 1986, it pierced the dreams of millions about who watched the tragedy unfold live on television. It also eventually exposed the weaknesses of a space program that had been revered by many. In “Challenger: A True Story of Heroism and Disaster on the Edge of Space,” Adam Higginbotham provides the most definitive account of the explosion that took the lives of the seven-person crew.