Cika wannan jumla:
Winter War, Haitto ya halarci rangadin kide kide na Red Cross wanda kuma ya ziyarci Amurka don amfanin Finland. Haitto ya taka leda a Carnegie Hall tare da Sir John Barbirolli, a tsakanin sauran wurare, kuma ya bayyana a fim din 1941 "The Hard-Boiled Canary". A cikin 1942 Haitto da Sirpo sun zauna a Portland, Oregon, kuma Haitto ya yi karatu tare da Ivan Galamian a cikin 1943-1945. An san Haitto da gwaninta: ya buga waƙoƙin Niccolò Paganini ta hanyar da ba ta dace ba, kuma yana son kiɗan J. S. Bach.