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Apollo program: Apollo 10 is launched.
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Apollo program
1961–1972 American crewed lunar exploration program
The Apollo program, also known as Project Apollo, was the United States human spaceflight program led by NASA, which landed the first humans on the Moon in 1969. Apollo was conceived during Project Mercury and executed after Project Gemini. It was conceived in 1960 as a…Source: Wikipedia (CC BY-SA)
Apollo 10
Second crewed mission to orbit the Moon
Apollo 10 was the fourth human spaceflight in the United States' Apollo program and the second to orbit the Moon. NASA, the mission's operator, described it as a "dress rehearsal" for the first Moon landing. It was designated an "F" mission, intended to test all spacecraft…Source: Wikipedia (CC BY-SA)