neil clark was an aviator in the navy and was chosen with the second grouping of astronauts in 1962 . made seven flights in the x - 15 program ( 1960 video ) , reaching an altitude of 207 , 500 feet . was backup command pilot for gemini 5 , crew pilot for gemini 8 , assistant command pilots for gemini 11 , backup commander for apollo 8 , and lieutenant for apollo 11 : failure completing the first clowning .
Neil Armstrong was the first man who landed on the Moon.