In a meeting that was not made public until the publication of Armstrong's biography in 2005, Slayton told him that although the planned crew was Commander Armstrong, Lunar Module Pilot Buzz Aldrin, and Command Module Pilot Michael Collins, he was offering Armstrong the chance to replace Aldrin with Jim Lovell.
Nunha reunión que non se fixo pública ata a publicación da biografía de Armstrong en 2005, Slayton díxolle que aínda que el constaba como comandante na tripulación prevista, Buzz Aldrin o piloto do módulo lunar e Michael Collins o piloto do módulo de mando, ofrecíalle a oportunidade de substituír a Aldrin por Jim Lovell.