Andrei Dmitrievich Sakharov ( Russian : Андре́й Дми́триевич Са́харов ; May 21 , 1921 - December 14 , 1989 ) was a Russian nuclear physicist , anti-Soviet dissident and human rights activist .
Andrei Dmitrievich Sakharov ( Russian : Андре́й Дми́триевич Са́харов , May 21 1921 - December 14 1989 ) , was a Soviet nuclear physicist .