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To be honest I could not pick one. Any and all aircraft of WWII. To see them flying or in person 60 plus depending on aircraft's inception during WWII. I don't care if it was a At-6 to the Grumman duck to a B-17. To be still flying is an accomplishment and a labor of love, awe and inspiration to see them still flying and to command respect no matter what country they flew with. They are a part of history that can never be replaced. I salute them all and those that maintain them