DESC: It's hard to imagine any major military force being effective without air power, yet the use of planes in combat had humble beginnings and skeptics initially questioned their potential. But in many ways the military application of flight is exactly what has pushed the technology forward, especially in the case of the U.S. Air Force. This is the Air Force's story, as told through the 20 documentary films collected here that trace the evolution, the challenges, and successes of one of the most sophisticated fighting forces in the world.