Imagine being able to use satellites to count an enemy nation’s troops and missiles, to eavesdrop on communications between terrorists, or to locate a dictator’s top-secret chemical-weapons lab and direct missiles to its exact location to destroy it. This may sound like the futuristic world of fictional techno-thrillers, but today’s top-secret spy satellites are already capable of these activities and far more. Paul Kupperberg delves past the forbidding wall of government secrecy to get the facts on the history of the U.S. spy satellite program, its current capabilities, and its future possibilities.