sentences:  Engineers also launched sounding rockets so physicists could study the effects of high-altitude nuclear explosions and the nature of the recently discovered Van Allen radiation belts around the Earth.From the early years of Cold War, the need to test and evaluate supersonic aircraft technologies, associated munitions, and eventually space systems, required the Air Force to build specialized ground test facilities.As nuclear weapons and electronics became more a part of air power, two new locations for Test and Evaluation (T&E) were created.