Questions

what is the aviation time line ?

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I'm not quite sure I understand your question. For me, the aviation time line is the entire history leading up to the wright Brothers first flight and then the subsequent advances in technology since that first flight. I saw today that USAF has launched a new secret space vehle which is unmanned. This would be the latest line in the aviation time line.

For more infor mation why don't you check out this my Aviation History Timeline page.