The dangerous, emotional, and arduous toll of stealth ops has never been felt more deeply than by those who adopted completely separate personas to integrate themselves into a shadowy underworld. From "The Pond," an intelligence operation so secret the CIA was kept in the dark, to a luxury Red Sea diving resort covertly operated by Mossad agents, to the British security services' daring rescue of a double agent in Moscow, these undercover smokescreens were all driven by daring agents in service of executing a greater purpose.

While space has always been the final frontier, it's also been an unknowable one that every country has wanted to be first to conquer. Finally, newly released documents give us glimpses into NASA's covert plan to blow up the moon with a nuclear warhead, the Soviet Union's cover-up of history's deadliest space disaster, and how U.S. attempts to put spies in orbit paved the way for the first space station--and the secret space race that were hidden from headlines.