The conference floor was full of astronauts, engineers, and students. Bodies quickly filed past each other to find an open seat. My team of 4th graders waited impatiently to sit. Before I could join my fellow classmates, a hand reached out to guide me to a new seat, away from the others. Instead of sitting a few rows back, I was ushered toward the front. Next to me was John Glenn. Former astronaut. The first American to orbit the Earth. Fifth man to travel to space. I stared up at him in awe. He’s been to outer space. I want…