Answer:
Gemini Program
Step-by-step explanation:
In conjunction with the Apollo program the US launched the Gemini program which would develop technology for use on the Apollo spacecraft. Under the Gemini program the Americans learned how to change the orbit of a spacecraft, spent significant time in orbit to learn how the human body would be affected, brought two spacecraft together in a rendezvous in space, and also went on the first space walks outside of a space craft.