Adapted from the memoir of NASA astronaut Scott Kelly, who spent a record-breaking year in space. How does a boy struggling in school become an American hero and a space pioneer? Daredevil behavior? Check. Whether it is sailing leaky boats in the Atlantic Ocean or joining an ambulance corps to race to the rescue, living on the edge is required behavior for an astronaut. Sibling rivalry? Check. An identical twin brother who both cheers you on and...