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Between 1946 and 1951, the U.S. Army conducted test firings of captured German V-2 rockets at White Sands, New Mexico. These sounding-rocket flights reached high altitudes (120–200 km [75–125 miles]) before falling back to Earth. Although the primary purpose of the tests was to advance rocket technology, the army invited American scientists interested in high-altitude research to put experiments aboard the V-2s. An Upper Atmosphere Research Panel, chaired by the physicist James Van Allen, was formed to coordinate the scientific use of these rocket launchings. The panel had a central role in the early years of American space science, which ...(100 of 22189 words)