OR Tambo airport in Johannesburg - at least during the period over which I was stranded there - serviced mainly other African countries on the international side, rather than the plethora of European and Asian destinations serviced by Cape Town International.The airport was swarming with stranded Africans as a result - we were all stranded due to the snow - and the divide was stark.
Black people did not speak to whites. White people did not speak to blacks. Black SAns did not speak to stranded Rwandans or Egyptians. People avoided anyone who did not look and sound like them.
A very lonely, confusing and hostile place.