From 1964 to 1966, Hamm was a member of the USAF Air Demonstration Squadron, the Thunderbirds, at Nellis Air Force Base.
fɹʌm nˈaɪntiːnhˈʌndɹɪd sˈɪksti fˈoːɹ tə nˈaɪntiːnhˈʌndɹɪd sˈɪksti sˈɪks, hˈæm wʌzɐ mˈɛmbɚɹ ʌvðə jˌuːˌɛsˌeɪˈɛf ˈɛɹ dˌɛmənstɹˈeɪʃən skwˈɑːdɹən, ðə θˈʌndɚbˌɜːdz, æt nˈɛliz ˈɛɹ fˈoːɹs bˈeɪs.