John Watts Young was an astronaut, naval officer and aviator, test pilot, and aeronautical engineer. He became the ninth person to walk on the Moon as commander of the Apollo 16 mission in 1972. He flew on four different classes of spacecraft: Gemini...

Upon impact, the spacecraft sank into the soft snow but continued forward, rolling down the slope and gaining speed. As it neared a five hundred-foot cliff, the cosmonauts felt their hearts pound and adrenaline surge.