Tuhia he tohutoro mō tēnei wāhanga - I te tau 1945, e tata ana ki te mutunga o te pakanga i Uropi
I uru atu a Smyth ki te Operation Alsos huna. I rere atu te kaiparau 50-tau-tau ki Uropi hei awhina i te whakatau i te ahua o te kaupapa patu karihi a Tiamana me te hopu i nga taputapu me nga kaimahi. I tetahi wheketere kua whakarerea i Celle i kitea e ia he centrifuge e whakamahia ana mo te whakarei i te uranium, e whakaawe ana i te kaha ki te rapu i a Paul Harteck. I whaia hoki e Smyth a Paul Herold, Eberhardt Elbel, me tētahi Ahorangi Osenberg. I whakawhiwhia a Smyth ki te Medal of Freedom mo tana mahi ki a Alsos.