NASA's John Houbolt explains the crucial concept Lunar-Orbit Rendezvous (LOR).
The vital decision to choose the LOR concept over other lunar mission ideas ensured that the US landed a man on the Moon before the end of the 1960s.
Langley Research Center
Ref : L-62-5848
Date : 1962
NASA's famed rocket pioneer Wernher von Braun (C) explains the Saturn rocket to President Kennedy (R) at Pad B Launch Complex 37.
The President would not live to see it, but over 5 years later Apollo 8 would launch for the Moon.
Kennedy Space Center
Ref : 64P-0145
Date : 16 Nov 1963