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“Once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return.” — Leonardo da Vinci (1452 –1519), Renaissance artist and inventor who documented his theoretical flying experiments. As a licensed pilot, granted one who hasn’t taken the controls of an aircraft in many years, I can still relate to da Vinci’s intoxicating longing for flight.