Full circle

In World War One, pilots flew alone, engaging in aerial duels using rifles or revolvers. Solo planes evolved into two-seaters, then into ones capable of carrying entire squadrons. But, as aircraft gained speed and altitude, the trend reversed, and with the advent of supersonic technology, air warfare has come full circle--back to single numbers. The top-scoring Allied Fighter Pilot of World War Two chronicles the achievements of the greatest fliers of both sides, who played a big part in shaping the course of combat.