In the 1950s and early '60s, a small band of high-altitude pioneers exposed themselves to the extreme forces of the space age long before NASA's acclaimed Mercury 7 would make headlines. Though largely forgotten today, balloonists were the first to venture into the frozen near-vacuum on the edge of our world, exploring the very limits of human physiology and human ingenuity in this lethal realm.
Michael Murphy
Burkhard Bilger
Scott Carpenter
Francis French
John Glenn
Score: 7.8
Score: 7.8
Score: 10.0
Score: 8.1
Score: 7.6
Score: 7.0
Score: 6.7
Score: 7.0
