Astronauts are also required to accumulate a number of flight hours in high-performance jet aircraft.
ˈæstɹənˌɔːts ɑːɹ ˈɔːlsoʊ ɹᵻkwˈaɪɚd tʊ ɐkjˈuːmjʊlˌeɪt ɐ nˈʌmbɚɹ ʌv flˈaɪt ˈaʊɚz ɪn hˈaɪpɚfˈoːɹməns dʒˈɛt ˈɛɹkɹæft.