Kammala jumla mai zuwa: Ya sami kwamiti tare da Pakistan Air Force (PAF) a ranar 22 ga Yuni 1963 a cikin 36th GD ((P) Course tare da lambar serial PAK-4362, kuma kasancewar Wing Under Officer, ya kasance ɗan takara don Sword of Honour, amma bai ƙare ba. A cikin muhawara a Kwalejin PAF da ke Risalpur, Karim ya ba da shawara sosai game da Harkar Harshe na 1952, wanda ya tilasta wa Gwamnatin Pakistan ta kafa harshen Bengali a matsayin harshen hukuma daidai da Urdu da Ingilishi, waɗanda suke hukuma da manyan harsuna a Yammacin Pakistan. Daga baya aka zabi shi kuma aka san shi a matsayin kyaftin din kungiyar kwallon kwando a makarantar. Flight Lt. Matiur Rahman (wanda daga baya ya karbi Bir Sreshtho a cikin
1971 Bangladesh Liberation War) da Air Mataimakin Marshal Momtaz Uddin Ahmed sun kasance abokan karatunsa a duka Sargodha da Risalpur.