A well-defined objective helped Project Apollo accomplish its goal, but after it was completed it was hard to justify continuing the lunar missions.
ɐ wˈɛldᵻfˈaɪnd ɑːbdʒˈɛktɪv hˈɛlpt pɹˈɑːdʒɛkt ɐpˈɑːloʊ ɐkˈɑːmplɪʃ ɪts ɡˈoʊl, bˌʌt ˈæftɚɹ ɪt wʌz kəmplˈiːɾᵻd ɪt wʌz hˈɑːɹd tə dʒˈʌstᵻfˌaɪ kəntˈɪnjuːɪŋ ðə lˈuːnɚ mˈɪʃənz.