Andrei Sakharov
Andrei Dmitrievich Sakharov (Russian: Андре́й Дми́триевич Са́харов, May 21 1921 – December 14 1989), was a Soviet nuclear physicist. He was also a well-known dissident and human rights activist. Sakharov was an advocate of nuclear disarmament and civil liberties and reforms in the Soviet Union.