Thatcher's opposition to economic sanctions was challenged by visiting anti-apartheid activists, including South African bishop Desmond Tutu, whom she met in London, and Oliver Tambo, an exiled leader of the outlawed ANC guerrilla movement, whose links to the Soviet bloc she viewed with suspicion, and whom she declined to see because he espoused violence and refused to condemn guerrilla attacks and mob killings of black policemen, local officials and their families.
