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In page Trans-lunar injection:
"The United States launched its first lunar impactor attempt, Ranger 3, on January 26, 1962, which also failed to reach the Moon. This was followed by the first US success, Ranger 4, on April 23, 1962.[4] Another 27 missions to the Moon were launched from 1962 to 1973, including five successful Surveyor soft landers, five Lunar Orbiter surveillance probes,[5]:166 and nine Apollo missions, which landed the first humans on the Moon.
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