4 June 1966
In June 1966, during the darkest years of Apartheid, United States (US) Senator Robert Kennedy made a historic visit to South Africa. He was invited by the National Union of South African Students (NUSAS), an anti-Apartheid student movement, to deliver its Annual Day of Affirmation Speech, which was to be at the University of Cape Town. Kennedy was accompanied by his wife, Ethel, and a small number of close aides. 
References

Lulat,Y.G-M. etal,(1991) U.S. Relations with South Africa: An Annotated Bibliography: Volume One Books, Documents, Reports and Monographs, (Westview Press) pp.122-125|

RFK Center, ROBERT F. KENNEDY,[online] Available at www.rfkcenter.org [Accessed: 3 June 2013]