The capture of the U2 spy plane pilot Gary Powers was one of the tensest incidents of the Cold War. In modern warfare, high-flying surveillance planes are now totally unmanned, taking espionage literally to new heights. While these robotic drones are good news for the military, they have civil rights activists concerned; could these spy planes be used domestically?Continued in Part 7, "When War Becomes A Video Game."LEARN MORENorthrup Grumman Corporation