File:Apollo Earth Orbit Rendezvous - 10 launches required.jpg

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Summary

Description	English: Original caption: Three days before President Kennedy's lunar commitment, John D. Bird, "Jaybird" (left), captured Langley's enthusiasm for a moonshot in his sketch "TO THE MOON WITH C-1's OR BUST" (below). In essence, his plan called for a mission via earth-orbit rendezvous (EOR) requiring the launch of 10 C-1 rockets.
Date	1961
Source	http://history.nasa.gov/SP-4308/ch8.htm
Author	John D. Bird, "Jaybird" (NASA Langley)

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