What does it take to be an astronaut? Excellence at flying, courage, intelligence, resistance to stress, top physical shape, any checklist would include these. But when America created NASA in 1958, there was another unspoken rule: you had to be a man. Here is the tale of thirteen women who proved that they were not only as tough as the toughest man but also brave enough to challenge the government. They were blocked by prejudice, jealousy, and the...