All of the necessary technologies required to reach the Moon was first tested during Project Gemini, which comprised of ten missions in the mid-1960s.
Buzz Aldrin
Marc Averback
Charlie Bassett
Frank Borman
Eugene Cernan
Charles Conrad
Gordon Cooper
Richard Gordon
Gus Grissom
Jim Lovell
Jim McDivitt
Wally Schirra
Elliott See
Thomas Stafford
Edward H. White II