Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Bayan Armstrong ya zama kwamandan tallafi na Apollo 8, Slayton ya ba shi mukamin kwamandan Apollo 11 a ranar 23 ga Disamba, 1968, yayin da Apollo 8 ke zagaye da wata. A cikin wani taron da ba a bayyana shi ba har sai da aka buga tarihin Armstrong a shekara ta 2005, Slayton ya gaya masa cewa kodayake ma'aikatan da aka tsara sune Kwamandan Armstrong, Lunar Module Pilot Buzz Aldrin, da Kwamandan Kwamandan Kwamandan Michael Collins, yana ba Armstrong damar maye gurbin Aldrin da Jim Lovell. Bayan ya yi tunani game da shi har kwana ɗaya, Armstrong ya gaya wa Slayton cewa zai tsaya tare da Aldrin, kamar yadda ba shi da matsala wajen yin aiki tare da shi kuma ya yi tunanin Lovell ya cancanci kansa. Sauya Aldrin da Lovell zai sa Lovell ya zama matukin jirgi na wata, ba bisa ƙa'ida ba mafi ƙarancin matsayi, kuma Armstrong ba zai iya ba da hujjar sanya Lovell ba, kwamandan Gemini 12, a matsayin lamba 3 na ma'aikatan. An sanar da ma'aikatan Apollo 11 a ranar 9 ga Janairu, 1969, a matsayin Armstrong, Collins, da Aldrin, tare da Lovell, Anders, da Fred Haise a matsayin ma'aikatan tallafi.A cewar Chris Kraft, wani taron Maris 1969 tsakanin Slayton, George Low, Bob Gilruth, da Kraft sun ƙaddara cewa Armstrong zai zama mutum na farko a kan wata, a wani ɓangare saboda gudanarwar NASA ta gan shi a matsayin mutumin da ba shi da girman kai. Taron manema labarai a ranar 14 ga Afrilu, 1969, ya ba da ƙirar gidan LM a matsayin dalilin Armstrong na farko; ƙofar ta buɗe ciki da dama, yana mai da wuya matukin jirgi na Lunar Module, a gefen dama, ya fita da farko. A lokacin ganawarsu, mutanen hudu ba su san game da la'akari da ƙofar ba. Sanin farko game da taron a waje da ƙaramin rukuni ya zo lokacin da Kraft ya rubuta littafinsa. Hanyoyin da za a kewaye wannan matsala sun wanzu, amma ba a sani ba idan an yi la'akari da su a lokacin. Slayton ya kara da cewa, "Na biyu, kawai a kan ka'idojin ka'idoji, na yi tunanin kwamandan ya kamata ya zama mutumin farko... Na canza shi da zarar na gano suna da jerin lokutan da suka nuna hakan. Bob Gilruth ya amince da shawarar da na yanke".  Tambaya: Yaushe aka gudanar da taron kafofin watsa labarai?
14 ga Afrilu, 1969