Takes a look at the people behind covert operations and the inventions that hid in the clouds - from the observation balloons of the Civil War to modern electronic surveillance aircraft like the U2, AWACS, spy satellites, and the SR71 "Blackbird."
Takes a look at the people behind covert operations and the inventions that hid in the clouds - from the observation balloons of the Civil War to modern electronic surveillance aircraft like the U2, AWACS, spy satellites, and the SR71 "Blackbird."