A great hero.  Proof that sometimes if you shoot for the stars, you may just hit the moon.

Scientists and explorers are still my heroes. No matter what.

Flights of angels sing thee to thy rest.

He was also a Marine aviator.  Which, though I was Army, makes him my Brother.  Rest in Peace, Brother.

He was a true pioneer.  He'll be missed.

I remember as a little kid, living in Florida, watching his ship leave the Earth. The ground shook for miles around and the boom of those engines could be heard even farther away.
Thinking of him and that historic flight I can still hear the echo of that long ago launch even now.