It looked like they had a leak from one of the propellant tanks on the Lunar Module. If so, that meant abort!
Duke was startled. Why was it shaking so hard? What in the world was happening? There had to be something wrong with this rocket. He didn’t recall any briefing to expect this violent vibration as they sat on the launch pad.
T-90 seconds and all Charlie Duke could think about was let’s go! There was no fear, no reluctance, no second thoughts. He was consumed with the desire to hear the words Lift-off. He felt this was his one and only chance.
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, the Apollo Command and Service Module, the Apollo Lunar Module, and the Space Shuttle.