What’s in a Marne?fcAiSPflyingThe picked young men who will one day fly Uncle Sam’imilitary airplanes woke up one morning recently to find themselvei called ‘‘Aviation Cadets” instead of ‘‘Flying Cadets,’ by War Department order. It made little difference to them. 'They changed a fewsigns around, as the group above is doing, then went right on plug* ing for their “Wings” and commissions in the Air Corps.