I can't imagine the level of courage required to carry out one of those missions... every moment of them would be nail-biters for sure. Every sound... clunk of an valve engaging, every hiss sound, every movement, etc. would have my blood pressure through the roof. Amazing breed of people we had on those missions.
RIP Capt. Cernan!
According to the 2002 Guinness World Records, Apollo 10 set the record for the highest speed attained by a manned vehicle: 39,897 km/h (11.08 km/s or 24,791 mph) on May 26, 1969, during the return entry from the Moon.