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Place the four American space programs in the order in which they appeared.

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Answer:

Project Mercury was launched in the period ( 1959-1963). Project Gemini was just for a one year period (1965-1966). Project Apollo was launched in the period (1961-1975). Space Shuttle is a pretty latest project (1971-2011)

Step-by-step explanation:

User Tiago Peixoto
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