the 1950s and 1960s. He is considered by many as the father of practical astronautics. ______________________________________________________________________ 4. MIKHAIL KALASHNIKOV (born 1919)    a  Russian  (formerly  Soviet )  small arms designer, most famous for designing the  AK-47  assault rifle, the  AKM  and the  AK-74 . ________________________________________________________________________________ 5. ZHORES ALFEROV (born 1930)  a