The post-flight reports from each of the six Apollo missions regarding the success of a one-time attempt to land on the Moon confirmed in the opinion of each of the Commanders (pilots) that the LLRV was absolutely mandatory to train a human pilot to land a vehicle (the LM) of the Apollo era successfully on the lunar surface. Wayne Ottinger and his colleagues at FRC had created a marvelous flying machine called the Lunar Landing Training Vehicle, a unique machine that gave us the confidence and capabilities to ensure the Apollo Lunar Module never failed in landing at six different and unknown locations on the Moon. This remarkable book tells the full story of how they did it-Apollo will be ever thankful for their inspiration and innovation, a true milestone in the history of human flight. David R. Scott Commander, Apollo 15 March 3, 2023