In Tyson's opinion, what is the greatest achievement of human flight?

According to Neil Degrease Tyson in his text "To Fly" the biggest achievement of human flight is the voyager 2.

Explanation:

The reasons behind this are that Tyson explains very well that not the first airplane, helicopter, or space rocket were the biggest achievements. But the voyager because it allowed the human race to understand the universe in a way we always wanted to do but we couldn't. Considering the voyager 2 is a robotic spacecraft equipped with incredibly precise machines that allow us to discover outer systems, planets, bodies, and phenomenons. As beams, radiation, sounds, and exo-planets.