To ferret out the secrets of weather conditions behind enemy lines, the Air Force last week was busily briefing a subtle new kind of spy. Its name is the Grasshopper; its job is to parachute into enemy territory and report back by radio. When it goes into action, the Grasshopper looks for all the world like one of the intelligent mechanical monsters of an animated movie cartoon.
As soon as the Grasshopper hits the ground, it plunges into a flurry of activity. First, a small explosive charge goes off and cuts the automatic parachute loose (to keep the Grasshopper from being...
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