Deke Slayton gave Armstrong the option to replace Aldrin with Lovell, since some thought Aldrin was difficult to work with.
dˈiːk slˈeɪtən ɡˈeɪv ˈɑːɹmstɹɔŋ ðɪ ˈɑːpʃən tə ɹᵻplˈeɪs ˈɔːldɹɪn wɪð lˈʌvɛl, sˈɪns sˌʌm θˈɔːt ˈɔːldɹɪn wʌz dˈɪfɪkəlt tə wˈɜːk wɪð.