<prompt> Bhala ukuqhubeka kwalesi sigaba - Ekuqaleni kuka-April 1945, emasontweni ambalwa ngaphambi kokuphela kwempi  <response>: , futhi elwa nokuntuleka okukhulu kwabasebenzi abanamakhono ngenxa yokubulawa kwabantu empini, iziphathimandla zamasosha zaqasha u-Iwan Katz enkambini yokuhlushwa ukuba asebenze njengodokotela wamasosha emaqenjini asedolobheni. Akukacaci ukuthi wake waba naluphi ulwazi lwezokwelapha kuze kube yilesi sikhathi, kodwa i-Medicine yayingenye yezifundo ayezifunde enyuvesi eminyakeni engamashumi amathathu nesigamu ngaphambili. Ngo-20 Ephreli 1945, wakhushulelwa esikhundleni sokuba ngudokotela oyinhloko emaqenjini aseJalimane ayethunyelwe eMauthausen. Imithombo ihlonipha indima yakhe ekuqinisekiseni ukuthi lapho amabutho ase - U.S. efika ekuqaleni kuka - May 1945 i - Fortress yaseMauthausen yanikelwa ngaphandle kokudutshulwa isibhamu nhlangothi zombili. UKatz wahlala njengodokotela phakathi kukaMeyi 6 noJuni 7, 1945, enakekela abanye abasinda ekamu elikhulu lokuhlushwa, manje elalingasasasetshenziswa amasosha aseJalimane kodwa elalisetshenziswa amasosha aseMelika. 