Before launch, NASA had decided at least one crew member should be awake at all times to deal with problems that might arise.
bᵻfˌoːɹ lˈɑːntʃ, nˈæsɐ hæd dᵻsˈaɪdᵻd æt lˈiːst wˈʌn kɹˈuː mˈɛmbɚ ʃˌʊd biː ɐwˈeɪk æɾ ˈɔːl tˈaɪmz tə dˈiːl wɪð pɹˈɑːbləmz ðæt mˌaɪt ɚɹˈaɪz.